Wifi / off-state leakage

Andy Green andy at openmoko.com
Wed Aug 20 13:07:10 CEST 2008

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Somebody in the thread at some point said:

| So unless we're absolutely sure no GPIO can ever have a non-zero
| potential (or only through a very large impedance) while we're in

Have a look at the circuit and give some examples of signals that can be
in this condition in "off" state, then we can talk about it.  Otherwise
it's just handwaving.

AFAICT only the GSM PA has the situation it is powered outside PMU and
discrete MOSFET switch, so he is the only guy that can leak "from
outside".  But when I look at his digital connections, they are inputs
and the others are AC-coupled RF.  That is why I asked and you snipped
"do you expect" that to make trouble?  If we don't and there are no more
examples of powered circuit that can source the leak, what are we
talking about?

- -Andy
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