ZHCSHE0 December 2017 TMS320F28377D-EP
The USB controller operates as a full-speed or low-speed function controller during point-to-point communications with USB host or device functions.
The USB module has the following features:
Figure 4-77 shows the USB block diagram.
The accuracy of the on-chip zero-pin oscillator (Table 4-18, Internal Oscillator Electrical Characteristics) will not meet the accuracy requirements of the USB protocol. An external clock source must be used for applications using USB. For applications using the USB boot mode, see Section 5.10 (Boot ROM and Peripheral Booting) for clock frequency requirements.