[Gta04-owner] GTA04A3 System Manual

[Christoph Mair]

On Tue, Oct 11, 2011 at 11:41 PM, NeilBrown <neilb at suse.de> wrote:

> Questions/corrections:
>
>  2.1 Feature comparison
>  Sensors:
>                  2-axis Accelerometers (optional)
>
>  Should that be
>                  3-axis Accelerometer (optional)
One 3-axis

> Also I thought there was only one Accelerometer, but the schematics suggest
> there is either an LIS302 and and LSM303DHL,
> or an LIS302 and a BMA180 and a HMC5883L
Since the LSM303DHL is still not available for purchase it will be
removed. The LIS302 will disappear on the next version as well, IIRC.
Small chips which could take their place can still be proposed ;-)

> In either case, 2 accelerometers and a compass.
Finally it should be one accelerometer, a compass and a gyroscope.

> And the interrupt line from the accelerometer(s) are connected to GPIO lines
> on the CPU rather than on the power controller, which seems to suggest that
> the accelerometer cannot wake the system from sleep mode.  Is that correct?
I'm not sure about this but I think the processor can tell the power
controller that it wants to wake up.

Best regards,
  Christoph