The following block diagram highlights the main blocks in the USB OTG controller. The USB OTG controller is interfaced through the AMBA interconnect in the MSS. The USB OTG controller provides an ULPI interface to connect to the external PHY. Following are the main component blocks in the USB OTG controller:
- AHB Master and Slave Interfaces
- CPU Interface
- Endpoints (EP) Control Logic and RAM Control Logic
- Packet Encoding, Decoding, and CRC Block
- PHY Interfaces
Figure 1. USB OTG Controller
