Template:mpu The CN3630-400 SCP is a 64-bit quad-core MIPS secure network communication microprocessor (SNP) designed by Cavium and introduced in 2005. This processor, which incorporates four cnMIPS cores, operates at 400 MHz and dissipates 14 Watts. This processor includes a number of hardware networking accelerators including units for high-performance packet I/O processing, QoS, TCP, and encryption. This MPU supports up to 16 GiB of DDR2-800 ECC memory.

Cache

Main article: cnMIPS § Cache

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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$ 160 KiB 163,840 B 0.156 MiB L1I$ 128 KiB 131,072 B 0.125 MiB 4x32 KiB 64-way set associative   L1D$ 32 KiB 32,768 B 0.0313 MiB 4x8 KiB 64-way set associative Write-through L2$ 512 KiB 0.5 MiB 524,288 B 4.882812e-4 GiB     1x512 KiB 8-way set associative

Memory controller

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	Integrated Memory Controller
	Max Type DDR2-800 Supports ECC Yes Max Mem 16 GiB Controllers 1 Channels 1 Width 64 bit Max Bandwidth 5.96 GiB/s 6,103.04 MiB/s 6.4 GB/s 6,399.501 MB/s 0.00582 TiB/s 0.0064 TB/s Bandwidth Single 5.96 GiB/s

Expansions

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	Expansion Options
	PCI-X Width 64 bit Clock 133.33 MHz Rate 1,017.25 MiB/s Features host or slave UART Ports 2 GP I/O Yes

Networking

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	Networking
	MII RGMII Yes (Ports: 8) SPI SPI-4.2 Yes (Ports: 2)

Hardware Accelerators

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	Hardware Accelerators
	Encryption Hardware Implementation Yes Types DES, 3DES, AES up to 256 bit, SHA1, SHA-2 up to SHA-512, RSA, DH Networking TCP Yes QoS Yes

Block diagram

Datasheet

• OCTEON CN38XX /CN36XX 4 to 16-Core Product Brief