USB on-the-go full-speed (OTG_FS) RM0090
1368/1731 DocID018909 Rev 11
5. In Negotiated mode, when the A-device detects a suspend, it disconnects and switches
back to the host role. The OTG_FS controller deasserts the DP pull down and DM pull
down in the PHY to indicate the assumption of the device role.
6. The application must read the current mode bit in the Core interrupt
(OTG_FS_GINTSTS) register to determine the host mode operation.
7. The OTG_FS controller connects, completing the HNP process.