SLAU723A October 2017 – October 2018 MSP432E401Y , MSP432E411Y
If the SUSPEND bit in the USBPOWER register is set, the USB host controller completes the current transaction then stops the transaction scheduler and frame counter. No further transactions are started and no SOF packets are generated.
To exit SUSPEND mode, set the RESUME bit and clear the SUSPEND bit. While the RESUME bit is set, the USB host controller generates RESUME signaling on the bus. After 20 ms, the RESUME bit must be cleared, at which point the frame counter and transaction scheduler start. The host supports the detection of a remote wake-up.