---
page_id: wsd-using-gf180mcuocdio-in-librelane-0e1fd48e
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schema_version: 1
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title: "Thread: Using gf180mcu_ocd_io in LibreLane"
slug: wsd-using-gf180mcuocdio-in-librelane-0e1fd48e
route: /evidence/i-information/general/threads/using-gf180mcuocdio-in-librelane
section: reference
access: public
summary: 152 Discord messages from ℹ️ - Information/general/threads/using-gf180mcuocdio-in-librelane.md.
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tags: [discord, wafer-space, archive]
last_updated: 2026-08-19
talk_url: /evidence/i-information/general/threads/using-gf180mcuocdio-in-librelane.talk.md
talk_route: /evidence/i-information/general/threads/using-gf180mcuocdio-in-librelane/talk
---
# Thread: Using gf180mcu_ocd_io in LibreLane
Category: **ℹ️ - Information**
Parent channel: **#general**
Thread ID: `1443243481744277565`
Messages: **152**
## message-1443243487565975665
**2025-11-26T14:14:21.603+00:00 — tnt (@246tnt)**
- Message ID: `1443243487565975665`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443243487565975665
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
Creating a thread to avoid spamming #general 😅
```
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---
## message-1443244568022614077
**2025-11-26T14:18:39.204+00:00 — tnt (@246tnt)**
- Message ID: `1443244568022614077`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443244568022614077
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
And I also can't creae issues on the `gf180_ocd_io` repo because issues are disabled on it.
```
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---
## message-1443245853434314906
**2025-11-26T14:23:45.67+00:00 — Leo Moser (mole99) (@mole99)**
- Message ID: `1443245853434314906`
- Author ID: `323371864074485771`
- Nickname: Leo Moser (mole99)
- User name: mole99
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443245853434314906
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
Actually, I think there is no reason. I simply wanted to do it like the SCL library where you can just select a different one and all the views will point to that one instead. But the PAD library is a bit more complicated and just selecting a different one does not work that well.
```
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---
## message-1443246927020953682
**2025-11-26T14:28:01.633+00:00 — tnt (@246tnt)**
- Message ID: `1443246927020953682`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443246927020953682
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
Well having the `PAD_CELL_LIBRARY` is nice. But ATM some of the config seem to be set in the base file based on replacing `$PAD_CELL_LIBRARY` and some config is set by loading the subdirectory tcl file. And I think putting it all in the subdir file (possibly still using `$PAD_CELL_LIBRARY` so you can easily create new config for new IO lib by just copying and patching the little things needed.
```
**Reactions**
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---
## message-1443247119489171467
**2025-11-26T14:28:47.521+00:00 — tnt (@246tnt)**
- Message ID: `1443247119489171467`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443247119489171467
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
Now I'm faced with the much more annoying issue that OpenROAD is segfaulting on me during GlobalRouting 😩
```
**Reactions**
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---
## message-1443288385547669595
**2025-11-26T17:12:46.116+00:00 — tnt (@246tnt)**
- Message ID: `1443288385547669595`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443288385547669595
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
🎉 Found what OR didn't like 😁
```
**Reactions**
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---
## message-1443308250480115724
**2025-11-26T18:31:42.285+00:00 — tnt (@246tnt)**
- Message ID: `1443308250480115724`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443308250480115724
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
````text
```
292 Magic DRC errors found.
47 LVS errors found.
```
````
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## message-1443308363134931087
**2025-11-26T18:32:09.144+00:00 — tnt (@246tnt)**
- Message ID: `1443308363134931087`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443308363134931087
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**Content**
```text
The DRC errors are in the corner cells and looking at the upstream repo, I think @Tim Edwards already fixed them a few hours ago.
```
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## message-1443308430369493133
**2025-11-26T18:32:25.174+00:00 — tnt (@246tnt)**
- Message ID: `1443308430369493133`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Edited: 2025-11-26T18:32:29.98+00:00
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443308430369493133
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
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**Content**
```text
The LVS errors look related to the analog pads having DVSS shorted to ASIG5V ...
```
**Reactions**
- Resolved media URL: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11_media/1f636-300DD.svg
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## message-1443310101103378593
**2025-11-26T18:39:03.508+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1443310101103378593`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443310101103378593
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
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@tnt: I've been chasing those errors all day long. Hopefully it should be resolved by tomorrow.
```
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## message-1443310525009367103
**2025-11-26T18:40:44.575+00:00 — tnt (@246tnt)**
- Message ID: `1443310525009367103`
- Author ID: `596068704471482370`
- Nickname: tnt
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- Type: `Default`
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```text
@Tim Edwards DRC or also the LVS one ?
```
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---
## message-1443310963406143600
**2025-11-26T18:42:29.097+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1443310963406143600`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443310963406143600
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
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**Content**
```text
The DRC one. I should have time to look at the LVS issue but I was previously unaware of it. The DRC issue has been bugging me for a while; I just needed to find some time to work on it.
```
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## message-1443311648071880785
**2025-11-26T18:45:12.334+00:00 — tnt (@246tnt)**
- Message ID: `1443311648071880785`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443311648071880785
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
Ok. I'll just wait for the DRC one and keep digging on the LVS one, see if I can find what's the cause since it could very well be something on my side that I screwed up ...
```
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---
## message-1443313495406809332
**2025-11-26T18:52:32.773+00:00 — tnt (@246tnt)**
- Message ID: `1443313495406809332`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443313495406809332
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
@Tim Edwards BTW, did you adapt all the cells including `in_s` and `in_c` ? Just to make sure I can also use those 😅
```
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---
## message-1443324442397769768
**2025-11-26T19:36:02.739+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1443324442397769768`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443324442397769768
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
Yes. All digital cells are 3.3V compatible.
```
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---
## message-1443330703466037389
**2025-11-26T20:00:55.494+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1443330703466037389`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443330703466037389
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
@tnt: The LVS issue is due to a wayward "DVSS" label that got lost and wandered off and stuck itself to the ASIG5V pad.
```
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---
## message-1443333267301339167
**2025-11-26T20:11:06.76+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1443333267301339167`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443333267301339167
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
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**Content**
```text
I finally found the source of the label, hiding in the LEF file, under the sofa cushions.
```
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---
## message-1443342413966872740
**2025-11-26T20:47:27.495+00:00 — tnt (@246tnt)**
- Message ID: `1443342413966872740`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443342413966872740
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
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**Content**
```text
Yes, I saw that in the LEF already, I was about to update the issue on github 😅
```
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---
## message-1443342505641906318
**2025-11-26T20:47:49.352+00:00 — tnt (@246tnt)**
- Message ID: `1443342505641906318`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443342505641906318
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**Content**
```text
Still have some other LVS issue but that'll have to wait a bit.
```
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---
## message-1443343283567984671
**2025-11-26T20:50:54.824+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1443343283567984671`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443343283567984671
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
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**Content**
```text
I have confirmed that fixing the LEF caused the virtual short in the magic view to disappear. It has been pushed.
```
**Reactions**
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---
## message-1443357939221135501
**2025-11-26T21:49:09.004+00:00 — tnt (@246tnt)**
- Message ID: `1443357939221135501`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443357939221135501
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
Ok, yeah, remaining LVS is because one net gets extracted as `\IO_CORNER_NORTH_WEST_INST.DVSS_RING_uq0` and in the netlist it's `\IO_CORNER_NORTH_WEST_INST.DVSS_RING` and that causes port mismatch.
```
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---
## message-1443358096608202906
**2025-11-26T21:49:46.528+00:00 — tnt (@246tnt)**
- Message ID: `1443358096608202906`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443358096608202906
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
manually fixing that up and running netgen on the result checks out just fine.
```
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---
## message-1443358315735154828
**2025-11-26T21:50:38.772+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1443358315735154828`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443358315735154828
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
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**Content**
```text
If that's a top-level port then you can avoid the unique name by doing `extract unique notopports`, which was how I got the SRAM to pass LVS.
```
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---
## message-1443359282996314347
**2025-11-26T21:54:29.385+00:00 — tnt (@246tnt)**
- Message ID: `1443359282996314347`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443359282996314347
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**Content**
```text
Yeah, although technically they should be connected internally and not rely on any external connections.
```
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---
## message-1443359367863734343
**2025-11-26T21:54:49.619+00:00 — tnt (@246tnt)**
- Message ID: `1443359367863734343`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443359367863734343
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**Content**
```text
if I use that option, it wouldn't check if they are connected or not.
```
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---
## message-1443359490971009035
**2025-11-26T21:55:18.97+00:00 — tnt (@246tnt)**
- Message ID: `1443359490971009035`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443359490971009035
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**Content**
```text
I mean, if all the DVSS nodes were not connected somewhow, it wouldn't spot it.
```
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---
## message-1443359818592030730
**2025-11-26T21:56:37.081+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1443359818592030730`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443359818592030730
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**Content**
```text
One way to get around it is just to copy enough of the connection between them inside the top level cell that magic sees that they are connected within the top level. Magic does extraction on each individual cell without looking at what's in subcells that might be connecting things together. Modifying that behavior is probably a lot of work.
```
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---
## message-1443385708302831667
**2025-11-26T23:39:29.669+00:00 — Tim 'mithro' Ansell (@mithro_)**
- Message ID: `1443385708302831667`
- Author ID: `169786952432746498`
- Nickname: Tim 'mithro' Ansell
- User name: mithro_
- Type: `Reply`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443385708302831667
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**Reply/reference**
- https://discord.com/channels/1361349522684510449/1443243481744277565/1443247119489171467
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**Content**
```text
Please do report segfaults upstream - OpenROAD should *never* segfault.
```
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---
## message-1443598069747683423
**2025-11-27T13:43:20.583+00:00 — tnt (@246tnt)**
- Message ID: `1443598069747683423`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443598069747683423
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
`21154 KLayout DRC errors found.`
@Tim Edwards 😢
```
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---
## message-1443612854727999730
**2025-11-27T14:42:05.597+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1443612854727999730`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443612854727999730
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
@tnt : I assume those errors are coming from the I/O pads? Can you send me the layout and DRC results? I made many small changes to the I/O layouts, but they are still the same pads apart from swapping in a level shifter circuit in front of each digital pin. However, I read in the I/O GDS and regenerated it from magic, so a single missing output layer or incorrect rule could have a massive effect.
```
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---
## message-1443612890308542486
**2025-11-27T14:42:14.08+00:00 — tnt (@246tnt)**
- Message ID: `1443612890308542486`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443612890308542486
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
Lots of them are more due to marker layers causing different rules to apply.
```
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---
## message-1443613039332163695
**2025-11-27T14:42:49.61+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1443613039332163695`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443613039332163695
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
Presence or absence of marker layers? Did I manage to drop some ESD marker mask?
```
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---
## message-1443613173482651710
**2025-11-27T14:43:21.594+00:00 — tnt (@246tnt)**
- Message ID: `1443613173482651710`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443613173482651710
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
Absence. Of ESD and Latchup.
And then some Resistor marker layer added instead.
```
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---
## message-1443613359441186937
**2025-11-27T14:44:05.93+00:00 — tnt (@246tnt)**
- Message ID: `1443613359441186937`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443613359441186937
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
Let me create a reproducible.
```
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---
## message-1443613403745615922
**2025-11-27T14:44:16.493+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1443613403745615922`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443613403745615922
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
Okay. I'll need to regenerate them with mask hints for the marker layers. I don't think it's going to be a huge effort.
```
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---
## message-1443613646314803241
**2025-11-27T14:45:14.326+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1443613646314803241`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443613646314803241
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
This is the "dirty" part of "quick & dirty".
```
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---
## message-1443614548182568971
**2025-11-27T14:48:49.348+00:00 — tnt (@246tnt)**
- Message ID: `1443614548182568971`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443614548182568971
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
````text
```
klayout -b -zz -r ${PDK_ROOT}/gf180mcuD/libs.tech/klayout/tech/drc/gf180mcu.drc -rd input=/mnt/pdk/OL2/pdk_root/gf180mcuD/libs.ref/gf180mcu_ocd_io/gds/gf180mcu_ocd_io.gds -rd report=drc.klayout.lyrdb -rd feol=True -rd beol=True -rd conn_drc=True -rd wedge=True -rd run_mode=deep -rd thr=16 -rd topcell=gf180mcu_ocd_io__bi_24t
```
````
**Reactions**
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---
## message-1443614636464148552
**2025-11-27T14:49:10.396+00:00 — tnt (@246tnt)**
- Message ID: `1443614636464148552`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443614636464148552
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
this runs the DRC on only `gf180mcu_ocd_io__bi_24t` and will show the errors.
```
Other message metadata
```json
{
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---
## message-1443614701471924254
**2025-11-27T14:49:25.895+00:00 — tnt (@246tnt)**
- Message ID: `1443614701471924254`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443614701471924254
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
I mean obviously you need to check all the cells, but that's a good start 😅
```
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---
## message-1443614750545281205
**2025-11-27T14:49:37.595+00:00 — tnt (@246tnt)**
- Message ID: `1443614750545281205`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443614750545281205
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
And runs much faster than a full chip DRC
```
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---
## message-1443627325651554395
**2025-11-27T15:39:35.734+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1443627325651554395`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443627325651554395
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
@tnt : Where are you getting the file `gf180mcu.drc` from? I don't have that in my PDK.
```
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---
## message-1443627842603843656
**2025-11-27T15:41:38.985+00:00 — tnt (@246tnt)**
- Message ID: `1443627842603843656`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443627842603843656
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
@Tim Edwards Ah, from https://github.com/wafer-space/gf180mcu
```
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---
## message-1443627972866211920
**2025-11-27T15:42:10.042+00:00 — tnt (@246tnt)**
- Message ID: `1443627972866211920`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443627972866211920
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
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**Content**
```text
I think it's just a top level calling all the rules deck. Probably on @Leo Moser (mole99) 's growing list of stuff to upstream 😅
```
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---
## message-1443628877648760984
**2025-11-27T15:45:45.759+00:00 — Leo Moser (mole99) (@mole99)**
- Message ID: `1443628877648760984`
- Author ID: `323371864074485771`
- Nickname: Leo Moser (mole99)
- User name: mole99
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443628877648760984
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- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
Exactly 😁
```
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---
## message-1443630030155677748
**2025-11-27T15:50:20.538+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1443630030155677748`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443630030155677748
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
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**Content**
```text
That file belongs in https://github.com/fossi-foundation/globalfoundries-pdk-libs-gf180mcu_fd_pv
```
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---
## message-1443630248796225596
**2025-11-27T15:51:12.666+00:00 — Leo Moser (mole99) (@mole99)**
- Message ID: `1443630248796225596`
- Author ID: `323371864074485771`
- Nickname: Leo Moser (mole99)
- User name: mole99
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443630248796225596
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**Content**
```text
First I need to merge: https://github.com/wafer-space/gf180mcu/pull/1
and ensure there aren't any regressions.
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---
## message-1443630842881769664
**2025-11-27T15:53:34.307+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1443630842881769664`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Edited: 2025-11-27T15:55:13.533+00:00
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443630842881769664
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
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**Content**
```text
Is that file written in ~~rust~~ ruby? I'm getting `ERROR: Can't run macro (no interpreter)` but I think I don't have ~~rust~~ ruby enabled in my version of klayout.
```
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## message-1443631031898083410
**2025-11-27T15:54:19.372+00:00 — Leo Moser (mole99) (@mole99)**
- Message ID: `1443631031898083410`
- Author ID: `323371864074485771`
- Nickname: Leo Moser (mole99)
- User name: mole99
- Type: `Default`
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It's written in ruby, perhaps that is missing?
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---
## message-1443631120997683270
**2025-11-27T15:54:40.615+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1443631120997683270`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443631120997683270
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**Content**
```text
I meant ruby, sorry. I thought rust was wrong, somehow.
```
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---
## message-1443631297967821002
**2025-11-27T15:55:22.808+00:00 — tnt (@246tnt)**
- Message ID: `1443631297967821002`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443631297967821002
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**Content**
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All klayout drc are written in ruby AFAIK
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## message-1443631747731423406
**2025-11-27T15:57:10.04+00:00 — tnt (@246tnt)**
- Message ID: `1443631747731423406`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
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I can run drc for each cell and post results if that's easier but I thought it'd be better if you could validate changes yourself
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---
## message-1443635400806760561
**2025-11-27T16:11:41.001+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1443635400806760561`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443635400806760561
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
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**Content**
```text
Posting results might be _quicker_ because I'm going to have to recompile klayout with ruby support.
But I did a layer-by-layer comparison between an original 5V I/O cell and my modified one, and I think I understand where I'm missing layers. Some of my generated layers (DUALGATE, for example) are not the same size as the original but are probably still valid. The main issue seems to be the missing "latchup" and "ESD" marker layers. Both are just two rectangular areas under the pad, and easy to add with mask hints.
There is another issue with all FETs being marked as 5V due to the fact that the I/O library was created before I modified the handling of 5V/6V cells, but that's easy enough to correct and probably doesn't make a difference anyway.
```
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---
## message-1443642653769207851
**2025-11-27T16:40:30.242+00:00 — tnt (@246tnt)**
- Message ID: `1443642653769207851`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443642653769207851
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**Content**
```text
Arf, sorry for dissapearing ... went to grab a drink, knocked something over and spent the last 30 min cleaning up my mess 😅
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---
## message-1443642668511920288
**2025-11-27T16:40:33.757+00:00 — tnt (@246tnt)**
- Message ID: `1443642668511920288`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443642668511920288
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**Content**
```text
Running DRC now.
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## message-1443644334280020068
**2025-11-27T16:47:10.907+00:00 — tnt (@246tnt)**
- Message ID: `1443644334280020068`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443644334280020068
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**Content**
```text
```
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---
## message-1443644355616309481
**2025-11-27T16:47:15.994+00:00 — tnt (@246tnt)**
- Message ID: `1443644355616309481`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443644355616309481
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**Content**
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@Tim Edwards
```
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---
## message-1443652040147337440
**2025-11-27T17:17:48.129+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1443652040147337440`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443652040147337440
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**Content**
```text
More work than I was expecting but shouldn't be too big of an issue.
```
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---
## message-1443687281402843216
**2025-11-27T19:37:50.299+00:00 — tnt (@246tnt)**
- Message ID: `1443687281402843216`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
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**Content**
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BTW, if there is anything I can do to help, I'd be happy to 🙂
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---
## message-1443692963027882117
**2025-11-27T20:00:24.904+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1443692963027882117`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443692963027882117
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
I may need to you run more klayout DRC checks. But I need to get some updates pushed, first. I have worked through most of the main errors already. Fortunately the highest _count_ of errors was in the array contact spacing, which was easy to fix (although it exposed a way to get around magic's generation of wider-spaced 4x4-and-up arrays, which is to stack 4 or more 1xN contact arrays next to each other, which then magic no longer sees as a single "large array").
```
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---
## message-1443728643997171732
**2025-11-27T22:22:11.91+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1443728643997171732`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443728643997171732
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
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**Content**
```text
@tnt : All right. I think I have a good handle on all the issues. I will push everything to the repository along with updates to open_pdks and everything should be ready to retest in the morning. I may have missed one or two things but nothing looks like it can't be dealt with pretty easily.
I do have to rethink the way I handle generating PPLUS and NPLUS around tap diffusion that is too close to an nwell edge, but I think I have methods now that will work right that weren't available when I originally wrote the GF180MCU tech file. I haven't tested them yet; instead I just made sure that all tap diffusion is well away from nwell edges. It seemed like everything in the I/O library was just slightly closer than the limit that triggers the extra overlap (0.43um).
```
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---
## message-1443743073019494441
**2025-11-27T23:19:32.057+00:00 — Tim 'mithro' Ansell (@mithro_)**
- Message ID: `1443743073019494441`
- Author ID: `169786952432746498`
- Nickname: Tim 'mithro' Ansell
- User name: mithro_
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443743073019494441
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
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**Content**
```text
@Tim Edwards - If you have docker installed you can get a docker container with the precheck with all the deps and PDK and everything.
```
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---
## message-1443769333661565031
**2025-11-28T01:03:53.082+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1443769333661565031`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443769333661565031
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**Content**
```text
@tnt : I have updated the PDK and the I/O library. I don't know if I managed to get everything, but it should be a lot cleaner than before.
```
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---
## message-1443857796842913812
**2025-11-28T06:55:24.348+00:00 — tnt (@246tnt)**
- Message ID: `1443857796842913812`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443857796842913812
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**Content**
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@Tim Edwards Indeed, it seems much cleaner now 🙂
```
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## message-1443858046341353575
**2025-11-28T06:56:23.833+00:00 — tnt (@246tnt)**
- Message ID: `1443858046341353575`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443858046341353575
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**Content**
```text
```
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## message-1443858128864284768
**2025-11-28T06:56:43.508+00:00 — tnt (@246tnt)**
- Message ID: `1443858128864284768`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443858128864284768
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
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**Content**
```text
only fillnc and bi_24t still have items.
```
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## message-1443863673457082390
**2025-11-28T07:18:45.442+00:00 — tnt (@246tnt)**
- Message ID: `1443863673457082390`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Edited: 2025-11-28T07:19:15.744+00:00
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443863673457082390
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
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```text
I was looking at this extra overlap limit in the DRM and quite confused because on the diagrams that 0.43um is measured from the "inside" edge !?!
```
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## message-1443863699030016061
**2025-11-28T07:18:51.539+00:00 — tnt (@246tnt)**
- Message ID: `1443863699030016061`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443863699030016061
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```text
```
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---
## message-1443865401829101600
**2025-11-28T07:25:37.518+00:00 — tnt (@246tnt)**
- Message ID: `1443865401829101600`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443865401829101600
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**Content**
```text
Just had a look at the exact errors and `filllnc` is just false positive because the cell can't be used by itself, it's too narrow but when put in the ring, there should be no errors ( although the `pr boundary` seems too wide ? )
And the `bi_24t` is minor issues with nplus/pplus extension but trivial to fix with maskhints.
```
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## message-1443916097295486978
**2025-11-28T10:47:04.259+00:00 — tnt (@246tnt)**
- Message ID: `1443916097295486978`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443916097295486978
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**Content**
```text
@Tim Edwards Som in `bi_24t`, one of the issue is ... probably a bug in magic or somewhere because if I load the `.mag` and do `gds write gf180mcu_ocd_io__bi_24t` , then there is the issue, like this :
```
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---
## message-1443916121878040596
**2025-11-28T10:47:10.12+00:00 — tnt (@246tnt)**
- Message ID: `1443916121878040596`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443916121878040596
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## message-1443916295870611467
**2025-11-28T10:47:51.603+00:00 — tnt (@246tnt)**
- Message ID: `1443916295870611467`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443916295870611467
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Then I don't do anything else, but just re run the same `gds write` command and then the issue isn't there and the gap was bridged.
```
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## message-1443916320499437669
**2025-11-28T10:47:57.475+00:00 — tnt (@246tnt)**
- Message ID: `1443916320499437669`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443916320499437669
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**Content**
```text
```
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---
## message-1443918352925065301
**2025-11-28T10:56:02.043+00:00 — tnt (@246tnt)**
- Message ID: `1443918352925065301`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443918352925065301
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````text
The other one I fixed with this :
```diff
diff --git a/magic/comp018green_out_paddrv_6T_PMOS_GROUP.mag b/magic/comp018green_out_paddrv_6T_PMOS_GROUP.mag
index 98627ee..6a58925 100644
--- a/magic/comp018green_out_paddrv_6T_PMOS_GROUP.mag
+++ b/magic/comp018green_out_paddrv_6T_PMOS_GROUP.mag
@@ -3272,4 +3272,6 @@ use PMOS_metal_stack PMOS_metal_stack_6
timestamp 1758724778
transform 1 0 809 0 1 496
box -44 0 1584 12000
+<< properties >>
+string MASKHINTS_NPLUS 12251 -768 12331 14372
<< end >>
```
````
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---
## message-1443918413968838667
**2025-11-28T10:56:16.597+00:00 — tnt (@246tnt)**
- Message ID: `1443918413968838667`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443918413968838667
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
but maybe you have a more elegant way of preventing it in the first place 😅
```
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---
## message-1443975206061346876
**2025-11-28T14:41:56.887+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1443975206061346876`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443975206061346876
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
@tnt : Yes, that's where the nwell needs to be extended out to 0.43um to prevent the little stub of NPLUS from showing up. The algorithm I came up with to deal with the extra overlap of NPLUS or PPLUS for diffusion edges close to an nwell edge works fine except when the diffusion is just slightly less than than the 0.43um limit away from the edge. Obnoxiously, most of the nwells in the I/O cells have been drawn just slightly under this limit, which then unfortunately highlights where my algorithm doesn't work right.
```
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}
```
---
## message-1443975697264672860
**2025-11-28T14:43:53.999+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1443975697264672860`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Reply`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443975697264672860
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Reply/reference**
- https://discord.com/channels/1361349522684510449/1443243481744277565/1443863673457082390
Reference data
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**Content**
```text
Yes, I've looked at that illustration before and decided it's an error in the illustration (one of many).
```
Other message metadata
```json
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---
## message-1443978692891119626
**2025-11-28T14:55:48.212+00:00 — tnt (@246tnt)**
- Message ID: `1443978692891119626`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443978692891119626
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
I have a new chip-wide precheck running ATM, hopefully it will be clear.
```
Other message metadata
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"author": {
"avatarUrl": "2025-11_media/88d17af9d19ab43565b0c46751ef7d12-DFEE5.png",
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"message": {}
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```
---
## message-1443989488295739556
**2025-11-28T15:38:42.037+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1443989488295739556`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443989488295739556
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
I made a few edits so that the tap diffusion is wide enough that the NPLUS and PPLUS overlap of contacts is the same width as the overlap of the diffusion, so the NPLUS and PPLUS form simple rectangles that don't need to be hierarchically checked to close up gaps between the shapes. There was plenty of room to extend the taps outward and I should have done that earlier, just for the sake of the layout being cleaner. So there will be one more round of updates and the I/O pads should be squeaky-clean by tomorrow. I still need to rework the algorithm that generates the too-thin diffusion artifacts, but at least the errors only show up in pathological cases.
```
Other message metadata
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```
---
## message-1443994259744227472
**2025-11-28T15:57:39.639+00:00 — tnt (@246tnt)**
- Message ID: `1443994259744227472`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1443994259744227472
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
Ok, hopfully it will show up in a `ciel` release and I can use that to do the final build.
```
Other message metadata
```json
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---
## message-1444001169528590347
**2025-11-28T16:25:07.06+00:00 — tnt (@246tnt)**
- Message ID: `1444001169528590347`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1444001169528590347
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
It cleared the KLayout DRC deck. Got some magic DRC errors from the pre-check but I suspect it's because the tech file isn't up to date.
```
Other message metadata
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---
## message-1444002448359428177
**2025-11-28T16:30:11.957+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1444002448359428177`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1444002448359428177
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
I didn't change the tech file on this round. The DRC errors look like something that pops up after a GDS read, but I can reproduce them, so I'll take care of them.
```
Other message metadata
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---
## message-1444002799582183578
**2025-11-28T16:31:35.695+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1444002799582183578`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1444002799582183578
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
No, actually I think I just cut a corner and made the last several changes without running on drc(full), so totally my fault.
```
Other message metadata
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---
## message-1444003458012418230
**2025-11-28T16:34:12.677+00:00 — tnt (@246tnt)**
- Message ID: `1444003458012418230`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1444003458012418230
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
I still had the tech file from a while back.
```
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---
## message-1444003474034393298
**2025-11-28T16:34:16.497+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1444003474034393298`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1444003474034393298
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
It was an nwell spacing error?
```
Other message metadata
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---
## message-1444003556708454480
**2025-11-28T16:34:36.208+00:00 — tnt (@246tnt)**
- Message ID: `1444003556708454480`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1444003556708454480
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
Yes and also some via width < 0.28u
```
Other message metadata
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---
## message-1444003720412266598
**2025-11-28T16:35:15.238+00:00 — tnt (@246tnt)**
- Message ID: `1444003720412266598`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1444003720412266598
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
`Via3 width < 0.28um (V3.1 + 2 * V3.4)`
`MV N-well spacing < 0.74um (NW.2a)`
`Via4 width < 0.28um (V4.1 + 2 * V4.4)`
```
Other message metadata
```json
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---
## message-1444005611175153716
**2025-11-28T16:42:46.031+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1444005611175153716`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1444005611175153716
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Content**
```text
The nwell spacing is due to a tiny notch in an nwell and I'm fixing it now.
The via3/via4 errors are more bothersome---I'm guessing that they come from the same issue in the corner cell where some via rows were spaced close enough together that they get merged by magic, but the rows are slightly offset so they produce slivers that are narrower than the contact after the merge. But there seems to be some intermittent behavior there, because a few days ago I was fixing those, and after fixing all the errors I saw, I would re-write the GDS, and after reading the GDS back, the errors would appear again, somewhere else. It was like sometimes it would merge the rows and sometimes it wouldn't. I thought I had finally fixed the errors once and for all, but apparently not. The error would not be from the tech file, it would be from the corner cell itself.
```
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---
## message-1444006046229201100
**2025-11-28T16:44:29.756+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1444006046229201100`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1444006046229201100
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
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**Content**
```text
Arrgh, yes, I can see them. . .
```
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---
## message-1444098359836278884
**2025-11-28T22:51:19.035+00:00 — Tim 'mithro' Ansell (@mithro_)**
- Message ID: `1444098359836278884`
- Author ID: `169786952432746498`
- Nickname: Tim 'mithro' Ansell
- User name: mithro_
- Type: `Reply`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1444098359836278884
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Reply/reference**
- https://discord.com/channels/1361349522684510449/1443243481744277565/1443975697264672860
Reference data
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**Content**
```text
I would really love to create some improved documentation with actually useful GDS examples (which can be rendered into diagrams) of these things which are unclear.
```
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---
## message-1444429180413546627
**2025-11-29T20:45:52.807+00:00 — tnt (@246tnt)**
- Message ID: `1444429180413546627`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1444429180413546627
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
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**Content**
```text
```
**Attachments**
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---
## message-1444429241721819326
**2025-11-29T20:46:07.424+00:00 — tnt (@246tnt)**
- Message ID: `1444429241721819326`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1444429241721819326
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
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**Content**
```text
@Tim Edwards Errors in NP from the latest cells.
```
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---
## message-1444429304149704928
**2025-11-29T20:46:22.308+00:00 — tnt (@246tnt)**
- Message ID: `1444429304149704928`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1444429304149704928
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
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**Content**
```text
(sorry to be the bearer of bad news 😅 )
```
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---
## message-1444447852389732503
**2025-11-29T22:00:04.553+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1444447852389732503`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1444447852389732503
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
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**Content**
```text
@tnt : No problem, iterate until done.
Apparently I did not check the output after my last edit (sloppy or sleepy, not sure which. Or sloppy because of sleepy). Otherwise I would have seen that. I just forgot to add 0.02um to the top of the nwells. . . Sorry for forcing another round.
```
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---
## message-1444448121902989467
**2025-11-29T22:01:08.81+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1444448121902989467`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1444448121902989467
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**Content**
```text
I also still need to figure out why magic won't cleanly separate the VSS and DVSS when extracting the corner cell, because that's preventing a clean LVS on anything using the padframe.
```
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---
## message-1444453911749595359
**2025-11-29T22:24:09.217+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1444453911749595359`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1444453911749595359
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**Content**
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Now it's suddenly showing a property error in magic, but I think that's related to something that Mitch already pointed out to me, and it's a problem in magic that I need to look into. It's not a problem in the layouts.
```
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---
## message-1444505337028935690
**2025-11-30T01:48:29.959+00:00 — Tim 'mithro' Ansell (@mithro_)**
- Message ID: `1444505337028935690`
- Author ID: `169786952432746498`
- Nickname: Tim 'mithro' Ansell
- User name: mithro_
- Type: `Reply`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1444505337028935690
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- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
**Reply/reference**
- https://discord.com/channels/1361349522684510449/1443243481744277565/1444447852389732503
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**Content**
```text
Too much turkey? 🙂
```
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---
## message-1444506729642590270
**2025-11-30T01:54:01.984+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1444506729642590270`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1444506729642590270
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-11/2025-11.json
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**Content**
```text
@tnt : I got klayout recompiled with ruby support, so I should be able to run the DRC myself from now on. I just needed a little time away from the openframe project to get the compile done.
```
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---
## message-1444510814462541824
**2025-11-30T02:10:15.881+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1444510814462541824`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1444510814462541824
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**Content**
```text
@tnt : Also: Confirmed that the I/O cells are finally DRC clean.
```
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---
## message-1444511223730278400
**2025-11-30T02:11:53.458+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1444511223730278400`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
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**Content**
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@Tim 'mithro' Ansell : I had duck, not turkey. The wild turkeys have been wandering around my property recently. I guess they know it's safe here.
```
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---
## message-1444512008790867979
**2025-11-30T02:15:00.631+00:00 — Tim 'mithro' Ansell (@mithro_)**
- Message ID: `1444512008790867979`
- Author ID: `169786952432746498`
- Nickname: Tim 'mithro' Ansell
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The google campus in MTV had the occasional wild turkey wandering around it.
```
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---
## message-1446245336598446132
**2025-12-04T21:02:38.184+00:00 — tnt (@246tnt)**
- Message ID: `1446245336598446132`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
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Mmm, I'm having an antenna violations when connecting to the `SEL` signal of the `ocd` IO but I don't see how that would be possible.
```
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## message-1446245685371338924
**2025-12-04T21:04:01.338+00:00 — tnt (@246tnt)**
- Message ID: `1446245685371338924`
- Author ID: `596068704471482370`
- Nickname: tnt
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- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1446245685371338924
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**Content**
```text
Violating rule is `ANT.16_i_ANT.3`
```
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---
## message-1446245944331997294
**2025-12-04T21:05:03.079+00:00 — tnt (@246tnt)**
- Message ID: `1446245944331997294`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
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```text
But (1) the `Metal2` line that connects to that pin is really not that long, like 90 um or so. And (2) there is AFAICT an antenna diode on that input.
```
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---
## message-1446248197444993024
**2025-12-04T21:14:00.263+00:00 — tnt (@246tnt)**
- Message ID: `1446248197444993024`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
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**Content**
````text
The detail on the error is :
```
ametal_eff: 202.5162
ratio: 401.817857143
agate: 0.504
max_ratio: 400
pmetal_factor: 0.54
adiodes: (0)
diode_factors: (800)
pmetal: 375.03
```
````
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## message-1446248524051120313
**2025-12-04T21:15:18.132+00:00 — tnt (@246tnt)**
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**Content**
```text
And indeed the gate area is 0.504. But there is an 1 um x 1 um diode on the same node, so the effective area should be 0.504 + 2 * 1 = 2.504 and thus the ratio is 80 which is _way_ below the 400 threshold
```
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---
## message-1446252728350277713
**2025-12-04T21:32:00.515+00:00 — tnt (@246tnt)**
- Message ID: `1446252728350277713`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1446252728350277713
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-12/2025-12.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-12/2025-12.json
**Content**
```text
Ah ... the DRC rule only consider `nplus + COMP` to be diodes.
```
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---
## message-1446252759832858645
**2025-12-04T21:32:08.021+00:00 — tnt (@246tnt)**
- Message ID: `1446252759832858645`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1446252759832858645
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-12/2025-12.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-12/2025-12.json
**Content**
```text
But the IO have `pplus + COMP`
```
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---
## message-1446255838577692822
**2025-12-04T21:44:22.051+00:00 — tnt (@246tnt)**
- Message ID: `1446255838577692822`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Edited: 2025-12-04T21:44:32.634+00:00
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1446255838577692822
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-12/2025-12.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-12/2025-12.json
**Content**
```text
Looking at the doc :
"""This comp area contained the protection diode and any other drain or source junction connected to this node."""
so `pplus + COMP` is perfectly valid and should be included in the `diodes` so I'm pretty sure that KLayout deck is wrong.
```
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---
## message-1446255905006948564
**2025-12-04T21:44:37.889+00:00 — tnt (@246tnt)**
- Message ID: `1446255905006948564`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1446255905006948564
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-12/2025-12.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-12/2025-12.json
**Content**
```text
(cc @Leo Moser (mole99) )
```
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---
## message-1446405824464556032
**2025-12-05T07:40:21.473+00:00 — Leo Moser (mole99) (@mole99)**
- Message ID: `1446405824464556032`
- Author ID: `323371864074485771`
- Nickname: Leo Moser (mole99)
- User name: mole99
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1446405824464556032
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-12/2025-12.json
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**Content**
````text
Thanks @tnt for the hint!
From the DRM:
> 1. Possible repairs to metal antenna nodes, which have a high via count or antenna ratio.
> a. Add an NCOMP/Substrate diode for NMOS gate, PCOMP/Nwell diode for PMOS gate.
> b. Break the metal close to the gate and jog the metal to an upper metal level.
So instead of:
```
diode = nplus.and(comp)
```
I would do:
```
n_diode = nplus.and(comp).not(nwell)
p_diode = pplus.and(comp).and(nwell)
diodes = n_diode || n_diode
```
(deep nwell not considered.)
Does that look reasonable to you?
````
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---
## message-1446408614704054323
**2025-12-05T07:51:26.718+00:00 — tnt (@246tnt)**
- Message ID: `1446408614704054323`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1446408614704054323
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-12/2025-12.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-12/2025-12.json
**Content**
```text
TBH I would think `comp.and(nplus.or(pplus)` would be enough.
```
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---
## message-1446408773479698442
**2025-12-05T07:52:04.573+00:00 — tnt (@246tnt)**
- Message ID: `1446408773479698442`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1446408773479698442
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-12/2025-12.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-12/2025-12.json
**Content**
```text
Technically if a signal is connected to what's basically a tap, that's also a diffusion that will dissipate charge I would think.
```
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---
## message-1446409159745736811
**2025-12-05T07:53:36.666+00:00 — tnt (@246tnt)**
- Message ID: `1446409159745736811`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1446409159745736811
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2025-12/2025-12.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2025-12/2025-12.json
**Content**
```text
But it's a rather weird case so the above would work just fine.
```
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---
## message-1496400805182570580
**2026-04-22T06:42:33.738+00:00 — tnt (@246tnt)**
- Message ID: `1496400805182570580`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1496400805182570580
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
**Content**
```text
@Tim Edwards BTW, basic testing seem to show that IO library works in silicon 🙂
```
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---
## message-1496403445987541123
**2026-04-22T06:53:03.355+00:00 — tnt (@246tnt)**
- Message ID: `1496403445987541123`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `ChannelNameChange`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1496403445987541123
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
**Content**
```text
Changed the channel name: Using gf180mcu_ocd_io in LibreLane
```
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---
## message-1496481688572792842
**2026-04-22T12:03:57.841+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1496481688572792842`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1496481688572792842
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
**Content**
```text
@tnt : What kind of "basic testing"?
```
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---
## message-1496481800565035068
**2026-04-22T12:04:24.542+00:00 — tnt (@246tnt)**
- Message ID: `1496481800565035068`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1496481800565035068
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
**Content**
```text
Well, they're fed 3.3v on both Vio and Vcore and they pass data between the inside and the outside of the chip 😅
```
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---
## message-1496481883914244177
**2026-04-22T12:04:44.414+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1496481883914244177`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1496481883914244177
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**Content**
```text
What chip was that? I thought I was the only one using my I/O library.
```
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---
## message-1496481929879617660
**2026-04-22T12:04:55.373+00:00 — tnt (@246tnt)**
- Message ID: `1496481929879617660`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1496481929879617660
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
**Content**
```text
That's the extend of the testing that will be done at the factory until I get my hands on the chips.
```
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---
## message-1496482017926185092
**2026-04-22T12:05:16.365+00:00 — tnt (@246tnt)**
- Message ID: `1496482017926185092`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Edited: 2026-04-22T12:05:21.359+00:00
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1496482017926185092
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
**Content**
```text
We have a version of the tiny tapeout GF 0.2 that uses your library.
```
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---
## message-1496482084070621225
**2026-04-22T12:05:32.135+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1496482084070621225`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1496482084070621225
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- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
**Content**
```text
Oh, wow, I didn't know that. Nice!
```
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---
## message-1496482549109620827
**2026-04-22T12:07:23.009+00:00 — tnt (@246tnt)**
- Message ID: `1496482549109620827`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1496482549109620827
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
**Content**
```text
Hopefully by end of next week I'll be able to make actual delay / rise / fall measurements and IV curves and all that stuff with different Vio and Vcore .
```
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---
## message-1496482696795262976
**2026-04-22T12:07:58.22+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1496482696795262976`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1496482696795262976
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
**Content**
```text
I don't think I ever actually tested operation with Vio at 3.3V.
```
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---
## message-1496482867633721367
**2026-04-22T12:08:38.951+00:00 — tnt (@246tnt)**
- Message ID: `1496482867633721367`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1496482867633721367
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
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**Content**
```text
I simulated that case and it's behaving just fine AFAICT. Pretty much same results as the original GF pads at 3.3v.
```
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## message-1496482985329823825
**2026-04-22T12:09:07.012+00:00 — tnt (@246tnt)**
- Message ID: `1496482985329823825`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1496482985329823825
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
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**Content**
```text
Some of your dies should be on their way to you so if you have bonding capability locally you can test those too 🙂 Looking fwd to seeing the 3.3V SRAM results 😁
```
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---
## message-1496877333406023713
**2026-04-23T14:16:06.92+00:00 — Tim 'mithro' Ansell (@mithro_)**
- Message ID: `1496877333406023713`
- Author ID: `169786952432746498`
- Nickname: Tim 'mithro' Ansell
- User name: mithro_
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1496877333406023713
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
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**Content**
```text
@tnt - The first package of Tiny Tapeout bonded die went out to you today.
```
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---
## message-1496878581115125761
**2026-04-23T14:21:04.397+00:00 — tnt (@246tnt)**
- Message ID: `1496878581115125761`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1496878581115125761
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
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**Content**
```text
@Tim 'mithro' Ansell Got a tracking number ? 😅
```
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---
## message-1496879073119571968
**2026-04-23T14:23:01.7+00:00 — Tim 'mithro' Ansell (@mithro_)**
- Message ID: `1496879073119571968`
- Author ID: `169786952432746498`
- Nickname: Tim 'mithro' Ansell
- User name: mithro_
- Type: `Reply`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1496879073119571968
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
**Reply/reference**
- https://discord.com/channels/1361349522684510449/1443243481744277565/1496878581115125761
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**Content**
```text
I would be able to get you one if the fedex website wasn't so terrible...
```
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---
## message-1496879142707134605
**2026-04-23T14:23:18.291+00:00 — tnt (@246tnt)**
- Message ID: `1496879142707134605`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1496879142707134605
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
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**Content**
```text
🤣
```
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---
## message-1496879187519344651
**2026-04-23T14:23:28.975+00:00 — tnt (@246tnt)**
- Message ID: `1496879187519344651`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1496879187519344651
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
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**Content**
```text
It's ok, I guess I should eventually get a notification by mail.
```
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---
## message-1496879237003743356
**2026-04-23T14:23:40.773+00:00 — tnt (@246tnt)**
- Message ID: `1496879237003743356`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1496879237003743356
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**Content**
```text
Better not share it publically anyway ..
```
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---
## message-1498346529780404377
**2026-04-27T15:34:10.632+00:00 — tnt (@246tnt)**
- Message ID: `1498346529780404377`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Edited: 2026-04-27T15:34:25.81+00:00
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1498346529780404377
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
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**Content**
```text
@Tim Edwards Did a bit more testing and they seem to perform just fine at 3.3V Got rise time of 2 ns and fall time of 1 ns ( not sure of the load, it's a test pcb + scope probe so probably in the 20~30 pF range ). And the output still looked pretty square outputting a 75 MHz clock. TBH they work better than the sky130 and IHP ones 😅
```
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---
## message-1498351891762122864
**2026-04-27T15:55:29.028+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1498351891762122864`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1498351891762122864
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
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**Content**
```text
The sky130 pads are over-designed and the IHP pads are under-designed, so that's not entirely surprising. Are you planning any tests at 5V?
```
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---
## message-1498352697735249921
**2026-04-27T15:58:41.187+00:00 — tnt (@246tnt)**
- Message ID: `1498352697735249921`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1498352697735249921
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
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**Content**
```text
@Tim Edwards Yes I am. But the breakout I have is unsuitable for 5V test ATM, so I need to wait until I get one where I can set Vio to what I want.
```
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---
## message-1498353308971044906
**2026-04-27T16:01:06.917+00:00 — tnt (@246tnt)**
- Message ID: `1498353308971044906`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1498353308971044906
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**Content**
```text
BTW there are diodes between Vcore and Vio, so Vio needs to come up first
```
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---
## message-1498359086335525116
**2026-04-27T16:24:04.348+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1498359086335525116`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1498359086335525116
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**Content**
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I'm not sure if I looked specifically for diodes between the power supplies. Would there happen to be a forward-biased diode from Vio to Vcore? That would be a big problem for running the I/O voltage at 5V.
```
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---
## message-1498359316489572413
**2026-04-27T16:24:59.221+00:00 — tnt (@246tnt)**
- Message ID: `1498359316489572413`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1498359316489572413
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**Content**
```text
No, it's forward biased from Vcore to Vio. So must have Vio >= Vcore
```
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---
## message-1498359833017974935
**2026-04-27T16:27:02.371+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1498359833017974935`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1498359833017974935
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**Content**
```text
In what cell(s)? A quick check of the netlist for `D` entries shows only diodes between pad and power, and between ground and power.
```
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---
## message-1498359976026968245
**2026-04-27T16:27:36.467+00:00 — tnt (@246tnt)**
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- Author ID: `596068704471482370`
- Nickname: tnt
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- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1498359976026968245
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
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**Content**
```text
Ah ... that I haven't searched yet, I can just tell you I see it in the silicon 😅
```
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---
## message-1498360114619486360
**2026-04-27T16:28:09.51+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1498360114619486360`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1498360114619486360
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
**Content**
```text
Probably some indirect path like through a pullup resistor or something.
```
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---
## message-1498360298741174312
**2026-04-27T16:28:53.408+00:00 — tnt (@246tnt)**
- Message ID: `1498360298741174312`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1498360298741174312
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
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**Content**
```text
I was feeding 3.3V to Vcore and I haden't power Vio yet and still the IO were powered through it ...
```
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---
## message-1498360534301413559
**2026-04-27T16:29:49.57+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1498360534301413559`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1498360534301413559
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2026-04/2026-04.json
**Content**
```text
I'll have to go analyze that one.
```
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---
## message-1500536702140285020
**2026-05-03T16:37:08.414+00:00 — tnt (@246tnt)**
- Message ID: `1500536702140285020`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1500536702140285020
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-05/2026-05.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2026-05/2026-05.json
**Content**
```text
Seems to happen in `io_inv_2i` inside the input path.
```
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---
## message-1500537068139577354
**2026-05-03T16:38:35.675+00:00 — tnt (@246tnt)**
- Message ID: `1500537068139577354`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1500537068139577354
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-05/2026-05.json
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**Content**
```text
There is a pmos whose source is wired to `VDD` (core) and nwell is biased by `DVDD`.
```
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---
## message-1500770294921429053
**2026-05-04T08:05:21.273+00:00 — tnt (@246tnt)**
- Message ID: `1500770294921429053`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1500770294921429053
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-05/2026-05.json
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**Content**
```text
As for 5V operation, doing some quick tests now. Seems all fine. I'm feeding 3.0V as Vcore and 5.0V as Vio and works just fine AFAICT.
```
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---
## message-1500785050873102447
**2026-05-04T09:03:59.366+00:00 — tnt (@246tnt)**
- Message ID: `1500785050873102447`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1500785050873102447
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-05/2026-05.json
- Archive source: https://discord.wafer.space/wafer-space/Voice%20Channels/general/using-gf180mcuocdio-in-librelane/2026-05/2026-05.json
**Content**
```text
There isn't any big change in performance. The measure rise time is longer but it's a bit of an artefact of the output shape.
```
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---
## message-1500785164014321716
**2026-05-04T09:04:26.341+00:00 — tnt (@246tnt)**
- Message ID: `1500785164014321716`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1500785164014321716
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-05/2026-05.json
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**Content**
```text
```
**Attachments**
- Resolved media URL: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-05/2026-05_media/shot_rise_time_hump_vio_3v3-BE94C.png
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---
## message-1500785540587454594
**2026-05-04T09:05:56.123+00:00 — tnt (@246tnt)**
- Message ID: `1500785540587454594`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1500785540587454594
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-05/2026-05.json
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**Content**
```text
There is a bit of a slow down right before hitting 80% and so that makes the measure point be almost twice as long ... I'd need to check if that's also in simulation. Could be non-linear capacitance/load on the line from the RP2350 chip being on that line.
```
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---
## message-1500936283248132236
**2026-05-04T19:04:55.974+00:00 — tnt (@246tnt)**
- Message ID: `1500936283248132236`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1500936283248132236
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**Content**
```text
@Tim Edwards ^^
```
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---
## message-1501007580338847804
**2026-05-04T23:48:14.525+00:00 — Tim Edwards (@rtimothyedwards_19428)**
- Message ID: `1501007580338847804`
- Author ID: `1365118310701600900`
- Nickname: Tim Edwards
- User name: rtimothyedwards_19428
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1501007580338847804
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-05/2026-05.json
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**Content**
```text
Or it could be from the latching stage of the level shifter.
```
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---
## message-1501170169601589309
**2026-05-05T10:34:18.826+00:00 — tnt (@246tnt)**
- Message ID: `1501170169601589309`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1501170169601589309
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-05/2026-05.json
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**Content**
```text
@Tim Edwards There is the same effect in the GF provided default IOs when powered at 3.3V so I don't think it's related to anything you did.
```
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---
## message-1501174313410367600
**2026-05-05T10:50:46.787+00:00 — tnt (@246tnt)**
- Message ID: `1501174313410367600`
- Author ID: `596068704471482370`
- Nickname: tnt
- User name: 246tnt
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1443243481744277565/1501174313410367600
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/general/using-gf180mcuocdio-in-librelane/2026-05/2026-05.json
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**Content**
```text
I think it's an artefact of the board layout, there is a small stuf to go to a 7 seg display and I think it's some reflection. Probing another pin that doesn't go to the 7 seg doesn't show that hump and has a better looking rise time.
```
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---