wafer.space Community - Are Digital I/O cells simultaneous INOUT capable?

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Between 2026-05-31 11:59 p.m. and 2026-07-01 12:00 a.m.

Any idea why is IE=1 and OE=1 marked as "disallowed"?

Yeah, that was a bit of a mystery but after reverse engineering the IO there is no reason that you can't have IE and OE at the same time.

6:31 a.m.

And we used them that way in TinyTapeout ( IE is always 1 and then we toggle OE as needed ) and they worked fine AFAICT.

Thanks! @tnt