Communication Processor Module
MOTOROLA MPC823e REFERENCE MANUAL 16-353
USB
COMMUNICATION
16
PROCESSOR MODULE
16.10.3 USB Controller Pin Functions and Clocking
The USB controller interfaces to the USB through a differential line driver and receiver. The
OE
signal enables the line driver when the USB controller transmits on the bus.
There are six I/O port pins associated with the USB port and their functionality is described in
Table 16-31. Some transceivers may need additional control lines (speed select or
low-power control), which can be supported by the general-purpose output lines.
MPC823e
Figure 16-112. USB Interface
USBTXP
USBRXD
D+
D-
USBOE
USBTXN
USBRXP
USBRXN
+
–
USB
TRANSCEIVER
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