Christoph Mair wrote: > The voltage is now between 3.32V and 3.44V which seems to be ok,
It seems a little high for a nominal 3.3 V, but it's within range. By the way, the accelerometers should be okay at a lower voltage: the chip has a valid supply voltage range of 2.16 to 3.6 V, with 2.5 V being the typical voltage. We couldn't go as low as 2.5 V, because we'd then violate the VDD_IO+0.3 V limit on the I/O pins, but a voltage as low as 3.0 V would be acceptable. The 2.8 V you measured initially would be too low, causing current to leak through the clamp diodes on the I/O lines during normal operation. If we're now operating at a hopefully constant ~3.3 V, it would be interesting to see if this has an effect on the accuracy of acceleration measurements. I wouldn't be surprised if it did. - Werner _______________________________________________ hardware mailing list hardware@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/hardware