Something seems wrong. The connector chart
USBH_PEN1 on pin 19.
The usb-on-24 page http://docwiki.gumstix.org/USB_24_Pin says
USBH_PWR1 is used to enable the port but doesn't connect anything to
USBH_PEN1. Is that right or is something mislabeled?
btw I corrected USBH_P1 and USBH_N1 on the chart. These data lines
were incorrectly labeled for usb port 0.