Thread: io pads versions

Category: ℹ️ - Information Parent channel: #⁉️-questions Thread ID: 1445297697773977671

Messages: 2

message-1445297697773977671

2025-12-02T06:17:03.482+00:00 — Evansika (@xintingjiang_36756)

• Message ID: 1445297697773977671
• Author ID: 1413605821430104114
• Nickname: Evansika
• User name: xintingjiang_36756
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Content

Hi all,
I noticed that there are 3 types of gds for the pad standard cells but only one type has .cdl file. Was curious which version should we use?

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message-1445315404120457349

2025-12-02T07:27:25.004+00:00 — Leo Moser (mole99) (@mole99)

• Message ID: 1445315404120457349
• Author ID: 323371864074485771
• Nickname: Leo Moser (mole99)
• User name: mole99
• Type: Default
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• Archive source: https://discord.wafer.space/wafer-space/Information/questions/io-pads-versions/2025-12/2025-12.json

Content

`fd` are the foundry provided cells. `ef` is from Efabless and modifies the digital I/O cell to add an analog pin. `ws` stands for wafer.space and modifies the power/ground pads to add another pin access layer, since that is necessary for OpenROAD to connect to the core ring.

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