I'm having some trouble getting USB to work reliably on a custom i.MX53-based board. Based on some reference designs, it appears that we may be using USB_H1_VBUS pin incorrectly. I looked through the reference manual for a description of the expected behavior of this pin, but didn't see a clear explanation anywhere. Can someone point me to the right section of the ref manual, or perhaps another document that would explain the purpose of this pin?
Any help is appreciated!