USB on-the-go full-speed/high-speed (OTG_FS/OTG_HS) RM0390
1264/1328 RM0390 Rev 4
determine host negotiation success. The application must read the current Mode bit in
the core interrupt register (OTG_GINTSTS) to determine host mode operation.
3. The application sets the reset bit (PRST in OTG_HPRT) and the OTG_FS/OTG_HS
controller issues a USB reset and enumerates the A-device for data traffic.
4. The OTG_FS/OTG_HS controller continues the host role of initiating traffic, and when
done, suspends the bus by writing the port suspend bit in the host port control and
status register.
5. In Negotiated mode, when the A-device detects a suspend, it disconnects and switches
back to the host role. The OTG_FS/OTG_HS 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_GINTSTS)
register to determine the host mode operation.
7. The OTG_FS/OTG_HS controller connects, completing the HNP process.
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