Hi Steve,
                     I have a Sharp LQ043T1DG01 4.3" 24-bit color touchscreen module that I want to interface with the Overo motherboard. 

The Sharp LCD display has a 4-wire analog resistive touchscreen panel. 

Can you confirm if the TPS65950 A/D pins are accessible from 

a. the overo motherboard itself via one of the three connectors or 
b. from the summit expansion board 

I couldn't find any detailed schematics on the overo motherboard or the summit expansion board, the hardware schematics section on the gumstix website has not yet been updated for the Overo. 

Best regards,

Elvis Dowson


On Dec 13, 2008, at 3:44 AM, Steve Sakoman wrote:

On Thu, Dec 11, 2008 at 10:46 PM, Elvis Dowson <elvis.dowson@mac.com> wrote:
Hi,
       Does the overo motherboard have an on-board A/D converter?

The product description page mentions A/D (6).

Yes, those A/D inputs come from the TPS65950 on the motherboard.

See below for more details:

http://focus.ti.com/docs/prod/folders/print/tps65950.html#technicaldocuments

Steve