COMMERCIAL TEMPERATURE RANGE

SEPTEMBER 1995

©1995 Integrated Device Technology, Inc.

5.3

DSC-3000/5

IDT79R3051/79R3052

FEATURES:

• Instruction set compatible with IDT79R3000A and

IDT79R3001 MIPS RISC CPUs

• High level of integration minimizes system cost, power

consumption

— IDT79R3000A /IDT79R3001 RISC Integer CPU

— R3051 features 4KB of Instruction Cache

— R3052 features 8KB of Instruction Cache

— All devices feature 2kB of Data Cache

— “E” Versions (Extended Architecture) feature full

function Memory Management Unit, including 64-

entry Translation Lookaside Buffer (TLB)

— 4-deep write buffer eliminates memory write stalls

— 4-deep read buffer supports burst refill from slow

memory devices

— On-chip DMA arbiter

— Bus Interface minimizes design complexity

• Single clock input with 40%-60% duty cycle

• 35 MIPS, over 64,000 Dhrystones at 40MHz

• Low-cost 84-pin PLCC packaging that's pin-/package-

compatible with thermally enhanced 84-pin MQUAD.

• Flexible bus interface allows simple, low-cost designs

• 20, 25, 33, and 40MHz operation

• Complete software support

— Optimizing compilers

— Real-time operating systems

— Monitors/debuggers

— Floating Point Software

— Page Description Languages

1

Clock

Generator

Unit

Master Pipeline Control

System Control

Coprocessor

Integer

CPU Core

Exception/Control

Registers

Memory Management

Registers

Translation

Lookaside Buffer

(64 entries)

General Registers

(32 x 32)

ALU

Shifter

Mult/Div Unit

Address Adder

PC Control

Virtual Address

Data

Cache

(2kB)

Instruction

Cache

(8kB/4kB)

Physical Address Bus

BIU

Control

DMA

Arbiter

4-deep

Read

Buffer

4-deep

Write

Buffer

Clk2xIn

Int(5:0)

32

32

BrCond(3:0)

Data Bus

Bus Interface Unit

Address/

Data

DMA

Ctrl

Rd/Wr

Ctrl

SysClk

2874 drw 01

The IDT logo is a registered trademark, and RISChipset, RISController, R3041, R3051, R3052, R3071, R3081, R3720, R4400 and R4600 are trademarks of Integrated Device Technology, Inc.

Figure 1. R3051 Family Block Diagram

Integrated Device Technology, Inc.