MPC875 datasheet(3/84 Pages) FREESCALE

3 / 84 page

MPC875/MPC870 Hardware Specifications, Rev. 3.0

Freescale Semiconductor

PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE

Features

— Boot chip-select available at reset (options for 8-, 16-, or 32-bit memory)

— Variable block sizes (32 Kbyte–256 Mbyte)

— Selectable write protection

— On-chip bus arbitration logic

•

General-purpose timers

— Four 16-bit timers or two 32-bit timers

— Gate mode can enable/disable counting.

— Interrupt can be masked on reference match and event capture

•

Two fast Ethernet controllers (FEC)—Two 10/100 Mbps Ethernet/IEEE 802.3 CDMA/CS that

interface through MII and/or RMII interfaces

•

System integration unit (SIU)

— Bus monitor

— Software watchdog

— Periodic interrupt timer (PIT)

— Clock synthesizer

— Decrementer and time base

— Reset controller

— IEEE 1149.1 test access port (JTAG)

•

Security engine is optimized to handle all the algorithms associated with IPsec, SSL/TLS, SRTP,

802.11i, and iSCSI processing. Available on the MPC875, the security engine contains a

crypto-channel, a controller, and a set of crypto hardware accelerators (CHAs). The CHAs are:

— Data encryption standard execution unit (DEU)

– DES, 3DES

– Two key (K1, K2, K1) or three key (K1, K2, K3)

– ECB and CBC modes for both DES and 3DES

— Advanced encryption standard unit (AESU)

– Implements the Rinjdael symmetric key cipher

– ECB, CBC, and counter modes

– 128-, 192-, and 256-bit key lengths

— Message digest execution unit (MDEU)

– SHA with 160- or 256-bit message digest

– MD5 with 128-bit message digest

– HMAC with either algorithm

— Master/slave logic, with DMA

– 32-bit address/32-bit data

– Operation at 8xx bus frequency

— Crypto-channel supporting multi-command descriptors

–

Integrated controller managing crypto-execution units

–

Buffer size of 256 bytes for each execution unit, with flow control for large data sizes

•

Interrupts

— Six external interrupt request (IRQ) lines

MPC875 数据表(PDF) 3 Page - Freescale Semiconductor, Inc

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