PMU I2C 47K Pullups not great
andy at openmoko.com
Tue Feb 5 08:52:26 CET 2008
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Somebody in the thread at some point said:
> Hi Andy:
> I think it's OK. Next production, we will change the pull high
> resistor to 10K. For EXTON1-3 issue, I must explain this again. In
> GTA02v5, I add these pull high resistors (100K) for these EXTON1-3.
Hi Allen -
The Dec 20 A5 schematic I have shows 10K to VB_SYS for these. If they
really are 100K, it makes the "crazy" waveform I found a bit easier to
> For EXTON, I found the PMU something has rising and falling edge
> detected on EXTON1-3. I tell the matt to mask these interrupt form
> EXTON1-3. For some GTA phone , the phone will auto power-on because
Yep, good solution.
> of the error detecting. Therefore, I want to change these pull
> resistor to 0 ohm and reduce some noise on these pins. I think is OK.
> Because these pin just input pins, they don't comsume any current.
Yep, sounds good.
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