Help to find Synaptics TM-01571-001 touchpad pinout

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I want to make a USB touchpad using an old one from Sony Vaio laptop.
The model number is TM-01571-001 and Synaptics number is TM1571 920-001769-01RevA

The problem is I cannot find the pinout of the touchpad anywhere. Is there anyone who is familiar with this model or can provide a datasheet?

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Here's my two cents:

These are the only signal connected to FPC connector, comparing with older models gives the following assumptions:

T23 is obviously GND

T22 is +5V (on other synaptics devices)

T5 and T6 are probably the buttons

So that leaves T12 and T13. They are most probably the USB signals. I'd just try connecting them to USB+ and USB- with 330 Ohm resistors in between. If it doesn't work, switch the two.

T10 and T11 were PS/2 CLK and DATA on older devices, they are not present on yours.

 

-Patrick
 

"Some people die at 25 and aren't buried until 75." -Benjamin Franklin

 

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