Intel® I/O Processors

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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 XScale® Technology

Intel® IOC340 I/O Controller

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 rep. 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	Active	Docs Dev Kit (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	Active	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

Features	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.