[gta02-core] Modem schematic / RF help needed

Dave Ball openmoko at underhand.org
Mon Sep 14 00:46:55 CEST 2009

Werner Almesberger wrote:
> Rask Ingemann Lambertsen wrote:
>>    I was thinking of just connecting the switch in parallel with R8101
>> (currently 0R that we would make NC) and connecting the enable input
>> (ON/OFF) to the GSM_2V8 supply.
> Oh, that would be a very elegant solution. Since the level shifter
> is operating only in the CPU -> modem direction, there should be
> no risk of the modem accidently keeping GSM_2V8 up.

I've just implemented this with the NTDG1100L (new part, so the symbol 
could do with a review too), and added the IO2V8 output to LDO3OUT on 
the PMU.


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