Hello,
Just wondering if I can get some clarification on the internal operation of the ID pin for the USB. The datasheet only has a single line reguarding its operation.
We are trying to get the OTG functionality working and looking at the ID pin, it wants it either grounded or floating, but no pull up on the line. It doesn't appear the is an internal pull-up either. How does this actually end up working out, is there a very low voltage comparitor or what? It seems strange because for normal device/host mode per the eval kits, you pull the line up/down.
Also, it implied that it looked at this pin to determine which mode to power up in, but the USB cable could potentially be plugged in and tie the ID pin to ground after the USB module is up and running, does the module need to be restarted? If so, where/how can the ID pin be monitored, as I'm not seeing a register address to accesss the state of this input.
Thanks for any help you can give.