Messages in this thread | | | Date | Fri, 12 Mar 2010 09:33:37 +0000 | From | Andy Green <> | Subject | Re: bit errors on spitz |
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On 03/12/10 09:07, Somebody in the thread at some point said:
>> Unless there's more to it in the way the zaurus using it that regulator >> isn't programmable digitally. > > OOPS, I made a mistake and linked ISL6721 instead of ISL6271 there. > Now it is fixed: > http://www.penguin.cz/~utx/zaurus/datasheets/power/XScale/ISL6271A.pdf > > This one has I2C. It is connected to GPIO 3 (PWR_SCL) and GPIO 4 > (PWR_SDA).
Thanks... that defaults to 1.3V on Vcore if you don't touch it. I guess confirm on the CPU datasheet that it's OK for your selected CPU clock speed.
> I guess that Zaurus has a good power design and that voltage should be > constant enough. CF has a dedicated step down (plus 2.8V power detector
In that case is the PXA CF driver PIO? Then it can be the same load on Vcore issue in disguise.
-Andy
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