MPC875CVR133 datasheet(2/84 Pages) FREESCALE

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MPC875/MPC870 PowerQUICC™ Hardware Specifications, Rev. 4

Freescale Semiconductor

Overview

1Overview

The MPC875/MPC870 is a versatile single-chip integrated microprocessor and peripheral combination

that can be used in a variety of controller applications and communications and networking systems. The

MPC875/MPC870 provides enhanced ATM functionality over that of other ATM-enabled members of the

MPC860 family.

Table 1 shows the functionality supported by the MPC875/MPC870.

2Features

The MPC875/MPC870 is comprised of three modules that each use the 32-bit internal bus: a MPC8xx

core, a system integration unit (SIU), and a communications processor module (CPM).

The following list summarizes the key MPC875/MPC870 features:

•

Embedded MPC8xx core up to 133 MHz

•

Maximum frequency operation of the external bus is 80 MHz (in 1:1 mode)

— The 133-MHz core frequency supports 2:1 mode only

— The 66-/80-MHz core frequencies support both the 1:1 and 2:1 modes

•

Single-issue, 32-bit core (compatible with the Power Architecture definition) with thirty-two

32-bit general-purpose registers (GPRs)

— The core performs branch prediction with conditional prefetch and without conditional

execution

— 8-Kbyte data cache and 8-Kbyte instruction cache (see Table 1)

– Instruction cache is two-way, set-associative with 256 sets in 2 blocks

– Data cache is two-way, set-associative with 256 sets

– Cache coherency for both instruction and data caches is maintained on 128-bit (4-word)

cache blocks

– Caches are physically addressed, implement a least recently used (LRU) replacement

algorithm, and are lockable on a cache block basis

— MMUs with 32-entry TLB, fully associative instruction and data TLBs

— MMUs support multiple page sizes of 4, 16, and 512 Kbytes, and 8 Mbytes; 16 virtual address

spaces and 16 protection groups

— Advanced on-chip emulation debug mode

•

Up to 32-bit data bus (dynamic bus sizing for 8, 16, and 32 bits)

Table 1. MPC875/MPC870 Devices

Part

Cache (Kbytes)

Ethernet

SCC

SMC

USB

Security

Engine

I Cache

D Cache

10BaseT

10/100

MPC875

8812

Yes

MPC870

—

MPC875CVR133 Datasheet(PDF) 2 Page - Freescale Semiconductor, Inc

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