hi!
what is your beagleboard release number?
Here is description from BB hardware reference manual:
2.5 –xM Revision B vs. –xM Revision C
There were seven changes made to the BeagleBoard-xM Rev C version over the Rev B design.
o Resistor loading was changed to allow for the reading of the Rev C revision by the SW. GPIO171=0, GPIO_172=1, and GPIO_173=0.
o Replacement of the processor from ES1.1 to ES1.2. For a detailed description of the issues present in the ES1.2 revision, please r efer to
http://focus.ti.com/lit/er/sprz319a/sprz319a.pdf . There are no issues resolved by ES1.2 that are anticipated to have any impact on the operation of the BeagleBoard-xM. ES1.2 is the latest revision.
o Fixed capacitor footprint in the PCB layout.
o Replaced the microSD connector with a new part. The current part was targeted for EOL and a new one was required. This required a PCB footprint change.
o Redesigned the overvoltage protection circuit. We were seeing issues with a small number of boards being da maged on the TPS2054 USB power FET, so a new design was implemented. Overall operation is the same as the original version with te exception that it is now possible to power the entire board over the USB OTG port. This includes the HUB. Care should be taken not to add high current devices on the USB ports as that will cause the host to shut down the USB port,
o Changed the default power state of the USB HUB to OFF as an added layer of protection to make s ure the USB power rails are off on initial power up. This will minimize the initial current drain on the board. SW can turn on the HUB power as needed by setting the TPS65950 LEDA/VIBRA.P pin LO to turn it on.
o Added the ability for the SW to detect when the board is powered from the DC supply or the OTG supply. Status is read from GPIO.6 pin on the TPS65950. If LO, then the board is powered from the DC jack. The HUB will only work in the DC powered mode so this change allows the board to know not to try and initializ e the USB Host when under OTG power..
Looks like there is no hardware changes for LCD I/F.
We may have a check for the Android 2.2 compatible for BB xm Rev. C
I found a post through the web which saying that Android 2.3 GingerBread solve the BB revC issue.
http://e2e.ti.com/support/embedded/f/50 ... 28477.aspx
Rgds,
Matthias