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Intel
®
IQ80321 I/O Processor Evaluation Platform
Introduction
1.6 Intel
®
80321 I/O Processor
About the Intel
®
80321 I/O processor.
The Intel
®
80321 I/O processor combines the Intel
®
XScale™ core with powerful new features to
create an intelligent I/O processor. This single-function PCI device is fully compliant with the PCI
Local Bus Specification, Revision 2.2. The Intel
®
80321 I/O processor-specific features include:
• Intel
®
XScale™ core
• PCI - Local Memory Bus Address Translation Unit (ATU)
• I
2
O* Messaging Unit (MU)
• Direct Memory Access (DMA) Controller
• Peripheral Bus Interface (PBI) Unit
• Integrated Memory Controller Unit (MCU)
• Performance Monitor Unit (PMU)
• Application Accelerator Unit (AAU)
• Two I
2
C Bus Interface Units (BIU)
• Synchronous Serial Port (SSP) Unit
• Eight General Purpose Input Output (GPIO) Ports
Figure 1. Intel
®
80321 I/O Processor Block Diagram
A9646-01
64-bit / 32-bit PCI Bus
I
2
C
Serial Bus
32-Bit
Interface
72-Bit
Interface
Serial Bus
I
2
C Bus
Interface
Peripheral
Bus
Interface
Application
Accelerator
Performance
Monitoring
Unit
Two
DMA
Channels
SSP
Serial Bus
Address
Translation
Unit
Intel
®
80321 I/O Processor
Intel
®
XScale™
Core
Internal Bus
Messaging
Unit
DDR
Memory
Controller
Unit