Usb Client Controller; Overview; Signals - Intel PXA27 Series Design Manual

'USB Client Controller

This chapter describes guidelines to interface the Universal Serial Bus (USB) Client Controller of
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Intel PXA27x Processor Family (PXA27x processor) to a USB client cable connector for
attachment to a USB network. Included in this chapter is a description of how to connect the
PXA27x processor single-ended USB Host and USB On-The-Go (OTG) ports to external
components.
12.1

Overview

A working knowledge of the Universal Serial Bus Specification, Revision 1.1
understand the material contained in this chapter. The USB Client controller is USB 1.1-compliant
and supports all standard device requests issued by any USB Host controller. Refer to the Universal
Serial Bus Specification, Revision 1.1 for a full description of the USB protocol and its operation.
The USB Client is a full-speed device that operates half-duplex at a baud rate of 12 Mbps as a slave
only, not a Host or Hub controller. The USB Host controller referenced in this chapter refers to any
Universal Serial Bus Specification, Revision 1.1-compliant USB Host controller, including the
internal USB host controller of the PXA27x processor.
The USB On-The-Go operation is specified in the On-The-Go Supplement to Universal Serial Bus
Specification, Revision 2.0.
Notice to the USB 2.0 Specification
12.2

Signals

See Table 12-1
Table 12-1. USB Client Controller Interface Signals Summary
Signal Name
USBC_P
USBC_N
1. Access the latest revision of the Universal Serial Bus Specification, Revision 1.1 using the Internet site at:
2. Access the latest revision of the On-The-Go Supplement to Universal Serial Bus Specification, Revision 2.0 using the Internet site at:
/www.usb.org/
3. Access the latest revision of the Pull-up/pull-down Resistors Engineering Change Notice to the Universal Serial Bus 2.0 Specification using
the Internet site at: http://www.usb.org/
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Intel PXA27x Processor Family Design Guide
2
Also, refer to the Pull-up/Pull-down Resistors Engineering Change
3
for additional information.
for description of the two USB Client signals.
Direction
Bidirectional USB Client port positive pin of differential pair
Bidirectional USB Client port negative pin of differential pair
Description
'USB Client Controller
12
1
is necessary to fully
http://www.usb.org/
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