Werner Almesberger werner at openmoko.org
Wed Aug 20 11:40:49 CEST 2008

Andy Green wrote:
> When IO_3V3 goes down it goes down... the pcf50633 has special
> arrangement to bring down "off" regulators to 0V.

Yet, in the past, we observed problems with power sneaking through
GPIOs from the permanently powered part of the system into the one
turned off. We're doing much better when it comes to sneak current
paths these days, but I wouldn't be overly confident that there
can't be surprises.

> IMO it doesn't make any harm to see MOSFET switches on the power rails
> to whole GSM side so there is no question.

I'd love to see that switch return as well.

- Werner

More information about the hardware mailing list