GTA02 Power Glitch Reason Found

Werner Almesberger werner at
Tue Feb 5 09:54:31 CET 2008

Andy Green wrote:
> VB_SYS has no decoupling at all on our design.

Nice catch !

> This is a real problem that is going to require manual rework before
> ship, but that should be possible neatly from the VB_SYS end of the
> recently added 10K resistors for EXTON[1..3] to 0V on C1764.

We're very lucky :-) What sucks is that VB_SYS isn't easily accessible
in any of the older designs, so reworking any pre-v5 hardware will be
fun ...

- Werner

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