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USB OTG2 host mode VBUS toggles continuously

Question asked by Prabhat Kumar on Apr 18, 2017
Latest reply on Apr 19, 2017 by Prabhat Kumar



In host mode, custom board USB OTG port detects the device and the USB_OTG2_ID pin goes low but the USB_OTG2_PWR pin from CPU is toggling from 0V to 3.2V continuously whenever a device (flash drive) is connected to the host. I checked USB_OTG2_OC pin and there is no over current issue either.

Can someone please explain why USB_OTG2_PWR continuously toggles when the board is in host mode?