| Intel IOP321 XScale-based I/O processor |
[Vendor: Intel]
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 is especially well suited to networked storage applications including RAID (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 applications requiring a high performance I/O subsystem in a tightly-integrated environment.
The IOP321 introduces a powerful 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.
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.
Product highlights - 32-bit high-performance CPU (400, 600 MHz) based upon Intel XScale microarchitecture
- Integrated 64-bit PCI-X interface (PCI 1.0A, PCI 2.2)
- 200 MHz DDR SDRAM with ECC (1 GB of 64-bit memory, 32-bit mode supported)
- Intel® Superpipelined RISC technology (7-stage integer, 8-stage memory)
- 32 KB data cache, 32 KB instruction cache
- 2 KB mini-data cache
- ARM Version 5TE compliant
- 32-bit local bus (100 MHz) / Flash I/F
- 1.6 GB/s internal bus (200 MHz)
- 2 DMA channels
- 2 Serial (I2C) + SPI Port
- Application Accelerator Unit with hardware-based XOR capability and 1 Kbyte queue
- Watchdog timer, 2 programmable timers (Auto-reload, programmed duration, selectable prescaling)
- 1024-byte DMA and 4096-byte ATU buffers
- 8 general-purpose I/O pins, 4 SDRAM output clocks, and integrated timers
- Performance Monitoring Unit
- 544L PBGA (35mm)
The IOP321 is supported by several implementations of Embedded Linux.
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