GTA02 Power Glitch Reason Found

Werner Almesberger werner at
Tue Feb 5 13:05:09 CET 2008

ALLEN_CHANG at wrote:
> Therefore, EXTON3 will have noise and we don't have KEEPACT function
> (always pull high).

We can sacrifice KEEPACT. Originally, we didn't even have KEEPACT in
the design, but we added it so that we could have it like a watchdog,
i.e., if the systems gets stuck in early power-up, KEEPACT would
bring it down again, and it wouldn't just sit there, burning power.

So that would have been a "nice to have" extra protection, but
nothing life-critical.

- Werner

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