9.2.1.2 CPU Interface
USB OTG controller sends interrupts to the Cortex-M3 processor using the CPU interface. The SmartFusion 2 USB OTG controller sends interrupts for the following events:
- When packets are transmitted or received
- When the USB OTG controller enters Suspend mode
- When USB OTG resumes from Suspend mode
The CPU interface block contains the common configuration registers and the interrupt control logic for configuring the OTG controller.