16 Board Manual
Intel® IQ80321 I/O Processor Evaluation Platform
Introduction
1.6 Intel® 80321 I/O Processor
About the Intel® 80321 I/O proces sor.
The Intel® 80321 I/O processor combines the Intel® XScale™ core with powerful n ew features to
create an intelligent I/O processor. This single-function PCI dev ice 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 Addre ss Translation Unit (ATU)
•I2O* 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 2C 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
I2C
Serial Bus
32-Bit
Interface
72-Bit
Interface
Serial Bus
I2C 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