Template:mpu CN5740-900 SP is a 64-bit octa-core MIPS storage processor (SP) designed by Cavium and introduced in 2007. This processor, which incorporates eight cnMIPS cores, operates at 900 MHz and supports up to DDR2-800 dual channel ECC memory. This MPU includes a number of hardware accelerators specifically for improving the performance of storage and network software such as RAID, networking, TCP & QoS acceleration.

Cache

Main article: cnMIPS § Cache

[Edit/Modify Cache Info]

Cache Organization Cache is a hardware component containing a relatively small and extremely fast memory designed to speed up the performance of a CPU by preparing ahead of time the data it needs to read from a relatively slower medium such as main memory. The organization and amount of cache can have a large impact on the performance, power consumption, die size, and consequently cost of the IC. Cache is specified by its size, number of sets, associativity, block size, sub-block size, and fetch and write-back policies. Note: All units are in kibibytes and mebibytes.

L1$ 384 KiB 393,216 B 0.375 MiB L1I$ 256 KiB 262,144 B 0.25 MiB 8x32 KiB     L1D$ 128 KiB 131,072 B 0.125 MiB 8x16 KiB     L2$ 2 MiB 2,048 KiB 2,097,152 B 0.00195 GiB     1x2 MiB

Memory controller

[Edit/Modify Memory Info]

	Integrated Memory Controller
	Max Type DDR2-800 Supports ECC Yes Controllers 1 Channels 2 Width 64 bit Max Bandwidth 11.92 GiB/s 12,206.08 MiB/s 12.799 GB/s 12,799.003 MB/s 0.0116 TiB/s 0.0128 TB/s Bandwidth Single 5.96 GiB/s Double 11.92 GiB/s

Expansions

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	Expansion Options
	PCIe Revision 1.0 Max Lanes 8 Configs x4, x8 UART GP I/O Yes

Networking

Interface options:

• 8-lanes PCIe + 8-lanes PCIe
• 8-lanes PCIe + 4 lanes PCIe + 4x [SGMII OR XAUI]
• 2x [4-lanes PCIe] + 2x [4x SGMII OR XAUI]

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	Networking
	MII XAUI Yes (Ports: 1) SGMII Yes (Ports: 4)

Hardware Accelerators

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	Hardware Accelerators
	Networking TCP Yes QoS Yes Compression Compression Yes Decompression Yes RAID RAID 5 Yes RAID 6 Yes

Block diagram

Datasheet

• OCTEON CN57XX Processors Product Brief