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IXP400 Software
Access-Layer Components: USB Access (ixUSB) API
April 2005 IXP400 Software Version 2.0 Programmer’s Guide
308 Document Number: 252539, Revision: 007
22.5 USB Data Flow
The USB device is a memory mapped device on the processor’s peripheral bus. It will not interact
directly with the NPEs. Any data path between USB and other components must be performed via
the Intel XScale core.
22.6 USB Dependencies
The USB device driver is a self-contained component with no interactions with other data
components. Figure 104 shows the dependencies for this USD component.
Figure 104. USB Dependencies
USB
Component
BSP mBuf Library
Board
USB Controller
USB User APIs
Hardware
B2420-01