44.1 Overview
The Universal Serial Bus (USB) module contains analog and digital components to provide a USB 2.0 full-speed and low-speed embedded host and full-speed device. This module in Host mode is intended for use as an embedded host and therefore does not implement a UHCI or OHCI controller.
The USB module consists of the following:
- Clock generator
- USB voltage comparators
- Transceiver
- Serial Interface Engine (SIE)
- USB DMA controller
- Pull-up and pull-down resistors
- Register interface
The integrated pull-up and pull-down resistors eliminate the need for external signaling components. The register interface allows the CPU to configure and communicate with the module. To complement the information in this data sheet, refer to the Section 27. USB On-The-Go (OTG) (DS61126).