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Thread: TT GF180 padframe

23 Discord messages from ℹ️ - Information/general/threads/tt-gf180-padframe.md.

Category: ℹ️ - Information Parent channel: #general Thread ID: 1418540236148838461

Messages: 23

message-1418668475790000291

2025-09-19T18:42:02.214+00:00 — Leo Moser (mole99) (@mole99)

Reply/reference

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message-1418668480173183006

2025-09-19T18:42:03.259+00:00 — Leo Moser (mole99) (@mole99)

Content

Thanks a lot Sylvain! Just updated the project template.
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message-1418668794833928283

2025-09-19T18:43:18.28+00:00 — Leo Moser (mole99) (@mole99)

Content

The padring now looks like this. Once you have yours we need to double check the bondpad positions. I have updated the padring script to also support pads with arbitrary widths, but for this case it should behave the same as before.

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message-1418669189471670303

2025-09-19T18:44:52.369+00:00 — tnt (@246tnt)

Content

Can you post the gds ?
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message-1418671868843524229

2025-09-19T18:55:31.181+00:00 — Leo Moser (mole99) (@mole99)

Content

Sure! Without fill I assume.
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message-1418671983729836232

2025-09-19T18:55:58.572+00:00 — tnt (@246tnt)

Content

Yes.
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message-1418672085584187472

2025-09-19T18:56:22.856+00:00 — tnt (@246tnt)

Content

Something looks wrong from the picture though.
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message-1418672244283932835

2025-09-19T18:57:00.693+00:00 — tnt (@246tnt)

Content

Wait, the orientation doesn't match.
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message-1418672276051857408

2025-09-19T18:57:08.267+00:00 — tnt (@246tnt)

Content

It's rotated 180 deg.
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message-1418672561050615970

2025-09-19T18:58:16.216+00:00 — Leo Moser (mole99) (@mole99)

Content

Is it? Pin 0 should be bottom left, but let's see... I'm almost at StreamOut.
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message-1418672887937896478

2025-09-19T18:59:34.152+00:00 — tnt (@246tnt)

Content

Bond pad 17, the first on the right edge at the bottom should be power.
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message-1418673141466796173

2025-09-19T19:00:34.598+00:00 — tnt (@246tnt)

Content

Ok, I just realized, in the text column I wrote "left" but it's actually "right" ...
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message-1418673386137063475

2025-09-19T19:01:32.932+00:00 — Leo Moser (mole99) (@mole99)

Content

I see 😄 Then let me check again
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message-1418673605012619407

2025-09-19T19:02:25.116+00:00 — Leo Moser (mole99) (@mole99)

Content

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message-1418673674000793652

2025-09-19T19:02:41.564+00:00 — Leo Moser (mole99) (@mole99)

Content

Here is the GDS anyways, just for the pad positions
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message-1418674470775685272

2025-09-19T19:05:51.53+00:00 — Leo Moser (mole99) (@mole99)

Content

Alright, rerunning!
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message-1418675980247240734

2025-09-19T19:11:51.416+00:00 — Leo Moser (mole99) (@mole99)

Content

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message-1418676111814168696

2025-09-19T19:12:22.784+00:00 — Leo Moser (mole99) (@mole99)

Content

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message-1418676362369302720

2025-09-19T19:13:22.521+00:00 — Leo Moser (mole99) (@mole99)

Content

Should be right this time!
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message-1418678236304642068

2025-09-19T19:20:49.302+00:00 — tnt (@246tnt)

Content

Yeah the position of power pads match.
The labels (input / bidir / clk / rst) don't but that doesn't matter, all those should be broken out 1:1 without any special consideration.

It's important for the breakout that :
- The PWR VDD AUX are _not_ connected to power rings, but just broken out to pins like other , just with decoupling caps
- The IO / Core VDD pins are correctly mapped to independent rings with appropriate decoupling.
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message-1418678802468438116

2025-09-19T19:23:04.286+00:00 — Leo Moser (mole99) (@mole99)

Content

Might be worth posting in the #📦-cob channel :)
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message-1418679545397252186

2025-09-19T19:26:01.414+00:00 — tnt (@246tnt)

Content

Pad position is fine, it's distributed equally, so I can make sure to match that ( if for some reason my script doesn't match it already ... ).
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message-1418680759752982699

2025-09-19T19:30:50.939+00:00 — Leo Moser (mole99) (@mole99)

Content

Great! After the script rewrite I had to triple check that this is still the case 😅
But I have yet to try a cell with a different width.
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