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Intel® I/O Processors

Many storage, networking, and embedded applications require fast I/O throughput for optimal performance. Intel® I/O processors allow servers, workstations and storage subsystems to transfer data faster, reduce communication bottlenecks, and improve overall system performance by offloading I/O processing functions from the host CPU.

The table below provides a quick overview of the Intel I/O processor family. The Intel® IOP34x family of processors, with Intel XScale® microarchitecture, builds on more than a decade of leadership in I/O processor technology.

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Intel® I/O processor product summary

Product PCI Express* PCI Speed Core Speed SAS/SATA Ports Memory Type Max Memory Status Resources
IOP348 x8 PCIe x8 PCI-E to 133 MHz PCI-X 1.2GHz 8 533MHz 32/64-bit DDR-II SDRAM 4 GB Please inquire with your Intel field representative for new designs Docs
IOP342 x8 PCIe x8 PCI-E to 133 MHz PCI-X 1.2GHz N/A 533MHz 32/64-bit DDR-II SDRAM 4 GB Not recommended for new designs Docs

Dev Kit File type/Size: PDF 310KB
IOP341 x8 PCIe x8 PCI-E to 133 MHz PCI-X 1.2GHz N/A 533MHz 32/64-bit DDR-II SDRAM 4 GB Not recommended for new designs Docs
IOP333 x8 PCIe x8 PCI-E to 133 MHz PCI-X 800 MHz N/A 333-400MHz 32/64-bit DDR SDRAM 2 GB (DDR);
1 GB (DDRII) 		Not recommended for new designs Docs
IOP331   133 MHz PCI-X 800 MHz N/A 333-400MHz 32/64-bit DDR SDRAM 2 GB (DDR);
1 GB (DDRII) 		Not recommended for new designs Docs
IOP321   133 MHz PCI-X 600 MHz N/A 200MHz DDR SDRAM 1 GB Not recommended for new designs Docs

Features and benefits

Intelligent I/O processor Offloads I/O processing functions, such as I/O interrupt processing and parity calculations, from the CPU. This allows the CPU to streamline application processing and to use other system resources, such as the system bus and memory, more effectively.
On-chip cache Improves data throughput by reducing external bus traffic.
Parallel transaction capabilities Eliminates the need to use expensive proprietary controllers to handle parallel transactions and compression algorithms.
Single-chip design Provides smaller packaging, simplified design, and board space cost savings. Full system-on-a-chip validation.
Comprehensive set of development tools Faster time-to-market. A complete range of compilers, debuggers, commercial and open source operating systems are available from multiple vendors.

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