Freescale Semiconductor MPC8313E Family Reference Manual page 943

Chapter 16
Universal Serial Bus Interface
This chapter describes the universal serial bus (USB) interface of the device. The USB interface
implements many industry standards. However, it is beyond the scope of this document to document the
intricacies of these standards. Instead, it is left to the reader to refer to the governing specifications.
The following documents are available from the USB Implementers Forum web page at
http://www.usb.org/developers/docs/.
• Universal Serial Bus Revision 2.0 Specification
• On-The-Go Supplement to the USB 2.0 Specification, Revision 1.0a
The following documents are available from the Intel USB Specifications web page at
http://www.intel.com/technology/usb/spec.htm.
• Enhanced Host Controller Interface (EHCI) Specification for Universal Serial Bus, Revision 1.0
• USB 2.0 Transceiver Macrocell Interface (UTMI) Specification, Version 1.05
The following documents are available from the ULPI web page at http://www.ulpi.org.
• UTMI + Specification, Revision 1.0
• UTMI Low Pin-Count Interface (ULPI) Specification, Revision 1.0
16.1 Introduction
The device implements a dual-role (DR) USB module. This module may be connected to an external port.
Collectively the module and external port are called the USB interface. The USB interface is shown in
Figure 16-1.
MPC8313E PowerQUICC II Pro Integrated Processor Family Reference Manual, Rev. 3
Freescale Semiconductor 16-1