[gta02-core] GTA02 GPS chip (ATR0635) VDD 1.8 power rail

[Rask Ingemann Lambertsen]

On Mon, Jun 22, 2009 at 03:26:47PM +0200, Joerg Reisenweber wrote:
> Am Mo  22. Juni 2009 schrieb Werner Almesberger:
> > ?lvaro Lopes wrote:
> > > * Why was this chosen over PMU 1.8 power rail (IO_1V8) (or the other
> > > way around) ?
> > 
> > I could see the following consequences of connecting GPS to IO_1V8:
> 
> > - IO_1V8 stays on in suspend while RF_3V (VDDIO, VCCx, VBP) can be
> >   cut. Not sure if this is an operating condition the ATR0635 would
> >   be happy in.
> 
> How are you supposed to switch off GPS then?

   Add a FET or another RT9702APB between IO_1V8 and GPS VDD18, gated by
RF_3V?

-- 
Rask Ingemann Lambertsen
Danish law requires addresses in e-mail to be logged and stored for a year