Hi,
I need some help with USB design.
The OMAP-L137's USB user guide SPRUFM9H
pg17 "2.2 Signal Descriptions" mentions that "USB0_ID pin should be either connected to ground or left floating".
Whereas, in Spectrum's OMAP-L137 EVM schematic sheet 6,
the USB0_ID is connected to "DSK_3V3" through NO-POP resistor,
I know NO-POP means not populated, but don't understand why USB0_ID is connected to "DSK_3V3"?
When using using OMAP-L137 USB as a device only mode, is it ok with the below connection
USB0_ID -> floating
USB0_VBUS -> pull-up to 5V with 1K ohm
Please let me know if there is any reference circuit for USB(2.0) Device mode.
Regards.