Feature List; Example Usb 2.0 System Configuration - Intel IXP45X Developer's Manual

Intel
Figure 36.

Example USB 2.0 System Configuration

The roles of the components of the USB 2.0 system have minor changes from the roles
in a USB 1.1 system. However, current peripheral products work with the USB 2.0
system without any changes. Additional performance is not required for many of the
human interface devices such as mice, keyboards, and game pads. Both USB 1.1 and
USB 2.0 devices will operate in a USB 2.0 system while opening up the possibilities of
exciting new higher bandwidth peripherals.
For additional information, refer to the USB 2.0 specification.
Note: The USB Host functionality for the IXP45X/IXP46X network processors is USB 2.0
specification-compliant but does not support the 480-Mbps, high-speed protocol.
9.4

Feature List

• Intel EHCI host controller. The USB host controller registers and data structures are
compliant to Intel
structures are implemented as extensions to the EHCI programmers interface.
Further information can be found on Intel's web site at: http://www.intel.com/
technology/usb/ehcispec.htm
• Directly connected USB legacy (USB 1.1) Full and Low speed devices without a
companion USB 1.1 host controller or host controller driver software using EHCI
standard data structures.
• Configurable dual port RAM buffers isolate memory latency on the system bus from
the timing requirements of the USB.
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Intel IXP45X and Intel IXP46X Product Line of Network Processors
Developer's Manual
354
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IXP45X and Intel IXP46X Product Line of Network Processors—USB 2.0 Host Controller
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EHCI specification. Device controller registers and data
B4018-01
August 2006
Order Number: 306262-004US