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Intel
®
IQ31244 Customer Reference Board
16 User’s Manual
3.0 Intel
®
80321 I/O Processor
The Intel
®
80321 I/O Processor is based on the Intel XScale
®
micro-architecture core (compliant
with ARM* architecture). The on-board 80321 processor supports 64-bit applications with
operating frequency of up to 100 MHz. The processor operates in conventional PCI mode or in
PCI-X mode as defined by the PCI-X Addendum to the PCI Local Bus Specification, Revision 1.0a.
The processor has the following features:
• Intel XScale
®
core
• PCI Local Memory Bus Address Translation Unit (ATU)
• Memory controller unit
• Peripheral Bus Interface (PBI)
• Application accelerator unit
• Two I
2
C bus interface units
• Two DMA channels
• Performance monitoring unit
• Synchronous serial port unit
• Messaging unit
• Eight general-purpose I/O ports
The 80321 block diagram is shown in Figure 3.