product brief
Intel® IOP321 I/O Processor with Intel®
XScale™ Microarchitecture and Integrated
PCI-X Launches Performance to New Levels
Product Highlights
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32-bit high-performance CPU (400, 600 MHz)
based upon Intel® XScale™ microarchitecture
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Integrated 64-bit PCI-X interface (PCI 1.0A,
PCI 2.2)
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200 MHz DDR SDRAM with ECC (1 GB of
64-bit memory, 32-bit mode supported)
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Intel® Superpipelined RISC technology (7-stage
integer, 8-stage memory)
The IOP321 is especially well suited to
networked storage applications including RAID
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32 KB data cache, 32 KB instruction cache
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2 KB mini-data cache
(Redundant Array of Independent Disks) adapter
cards, ROMB (RAID on motherboard), and other
storage applications. Its small package size, high
data throughput, and integrated AAU/XOR provide
an optimized solution for these applications. In
addition, the IOP321 is an ideal choice for
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ARM* Version 5TE compliant
32-bit local bus (100 MHz) / Flash I/F
1.6 GB/s internal bus (200 MHz)
2 DMA channels
applications requiring a high performance I/O
subsystem in a tightly-integrated environment.
2 Serial (I2C) + SPI Port
Application Accelerator Unit with hardware-
based XOR capability and 1 Kbyte queue
Product Overview
The IOP321 introduces a powerful
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Watchdog timer, 2 programmable timers (Auto-
reload, programmed duration, selectable
prescaling)
combination of technical advancements. The
133 MHz PCI-X interface achieves up to
1 Gbyte per second throughput, a two-fold
increase over 66 MHz PCI. The internal bus
operates at 200 MHz and offers internal
bandwidth of up to 1.6 Gbytes/second. The
IOP321 also features a 200 MHz DDF SDRAM
controller with ECC that supports up to 1 Gbyte
of 64-bit DDR SDRAM, two times that of the
previous generation. It contains a 100 MHz,
32-bit local bus that is excellent for embedded
applications requiring a connection to non-PCI
peripheral components such as ASICs, flash
memory, or DSPs.
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1024-byte DMA and 4096-byte ATU buffers
8 general-purpose I/O pins, 4 SDRAM output
clocks, and integrated timers
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Performance Monitoring Unit
544L PBGA (35mm)
Single-Chip I/O Processor Based on
Intel® XScale™ Technology
The Intel® IOP321 I/O processor is Intel's
fifth generation I/O processor. It is the first I/O
processor to integrate an Intel® XScale™
microarchitecture core and a PCI-X interface.
Many storage, networking, and embedded
applications require fast I/O throughput for
optimal performance. The IOP321 is a highly
integrated, cost-effective I/O system on a chip
that delivers a two-fold performance boost over
its predecessor, the Intel® IOP310 I/O processor
chipset, in I/O-intensive applications.
The IOP321 has additional features that
accelerate I/O throughput. A 2-channel DMA
controller facilitates increased PCI-to-memory
throughput and memory-to-memory throughput.
The application accelerator unit contains a
hardware-based XOR capability and a 1 Kbyte
queue to accelerate RAID-related parity
calculations. The application accelerator speeds
transfer of read and write data to the memory
controller and computes data parity across local
memory blocks.