USB 24 Pin
From Gumstix User Wiki
USB on the 24-Pin Flex Connector
The 24-pin flex connector has USB port 1 on it. When you're looking at the Verdex Pro COM, pin one is on the left, and pin 24 is on the right.
The connector is described here.
The pinouts you need are:
- V_BATT (pin 24) - USB power
- USBH_N1 (pin 18) - USB D-
- USBH_P1 (pin 17) - USB D+
- GND (pin 8) - USB Ground
In addition, you need to pull USBH_PWR1 (pin 20) up to 3.3 volts to enable the port. You need to provide a stable 3.3 volt supply, which is fairly simple to do by adding a small SOT23 package voltage regulator (like the LM3480), with the power input coming from V_BATT (pin 24) and the output going to USBH_PWR1 (pin 20).
