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April 10, 2001

© 2001 Integrated Device Technology, Inc.

DSC 4952

Block diagram

The IDT logo is a trademark and RC32134, RC32364, RC64145, RC64474, RC64475, RC4650, RC4640, RC4600,RC4700 RC3081, RC3052, RC3051, RC3041, RISController, and RISCore are trademarks of Inte-

grated Device Technology, Inc.

System Control

Coprocessor

(CPO)

Data Cache

(Lockable)

64-bit

330 MIPS

Instruction Cache

(Lockable)

16KB

16KB

RISCore4000

125 MFLOPS

Single/Double

FPA

32-/64-bit

Synchronized

System

Interface

Precision

Control Bus

Instruction Bus

Data Bus

CPU Core

Features

◆

High performance 64-bit microprocessor, based on the

RISCore4000

– Minimized branch and load delays, through streamlined

5-stage scalar pipeline.

– Single and double precision floating-point unit

– 125 peak MFLOP/s at 250 MHz

– 330 Dhrystone MIPS at 250 MHz

– Flexible RC4700-compatible MMU

– Joint TLB on-chip, for virtual-to-physical address mapping

◆

On-chip two-way set associative caches

– 16KB instruction cache (I-cache)

– 16KB data cache (D-cache)

◆

Optional I-cache and D-cache locking (per set), provides

improved real-time support

◆

Enhanced, flexible bus interface allows simple, low-cost

design

– 64-bit Bus Interface option, 1000MB/s bandwidth support

– 32-bit Bus Interface option, 500MB/s bandwidth support

– SDRAM timing protocol, through delayed data in write cycles

– RC4000/RC5000 family bus-protocol compatibility

– Bus runs at fraction of pipeline clock (1/2 to 1/8)

◆

Implements MIPS-III Instruction Set Architecture (ISA)

◆

3.3V core with 3.3V I/O

◆

Software compatible with entire RISController Series of

Embedded Microprocessors

◆

Industrial temperature range support

◆

Active power management

– Powers down inactive units, through sleep-mode feature

◆

100% pin compatibility between RC64574, RC64474 and

RC4640

◆

100% pin compatibility between RC64575, RC64475 and

RC4650

◆

RC64474 available in 128-pin QFP package, for 32-bit only

systems

◆

RC64475 available in 208-pin QFP package, for full 64/32 bit

systems

◆

Simplified board-level testing, through full Joint Test Action

Group (JTAG) boundary scan

◆

Windows® CE compliant

64-bit Microprocessor, based on