GTA04 PMU / Core arch block diagram v1

[Harald Welte]

On Wed, Apr 02, 2008 at 01:51:39PM +0100, Andy Green wrote:
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> Somebody in the thread at some point said:
>
> | | the MPU, so you can make calls over BT with the CPU off?
> |
> | ...oooh, very good point.
>
> Hum don't know if we can do it or not.  The current BT device uses USB
> to communicate with the CPU, which will go down with the CPU.  We can
> still power it though, so if it doesn't reset itself or otherwise rely
> on USB comms (eg, for clock) it can work.

I think BT should rather use a high-speed UART or SDIO  than USB.  USB
is really cumbersome in the suspend/resume case, esp. with regard to the
wakeup-from-bluetooth case (talk to Marcel Holtmann, if you need
details)

-- 
- Harald Welte <laforge at openmoko.org>          	        http://openmoko.org/
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