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DESCRIPTION

The IDT79R4640 is a low-cost member of the Integrated Device Technology, Inc. ORION family, targeted to a variety of performance-hungry embedded applications. The R4640 continues the ORION tradition of high-performance through high-speed pipelines, high-bandwidth caches and bus interface, 64-bit architecture, and careful attention to efficient control. The cost of this performance is reduced by removing functional units frequently not required for many embedded applications.

FEATURES

? High-performance embedded 64-bit microprocessor

- 64-bit integer operations

- 64-bit registers

- Based on the MIPS RISC Architecture

- 80MHz, 100MHz, 133 MHz and 150MHz operation frequency

- 32-bit bus interface brings 64-bit power to 32-bit system cost

? High-performance DSP capability

- 75 Million Integer Mul-Accumulate operations/sec @150MHz

- 50 MFlops floating-point operations @150MHz

? High-performance microprocessor

- 75 M Mul-Add/second @150MHz

- 50 MFlops @150MHz

- >340,000 dhrystone (2.1)/sec capability @133MHz (197 dhrystone MIPS)

? High level of integration

- 64-bit, 150 MHz integer CPU

- 50MFlops single-precision floating-point unit

- 8KB instruction cache; 8KB data cache

- Integer multiply unit with 75M Mul-Add/sec

? Upwardly software compatible with IDT RISController Family

? Easily upgradable to 64-bit system

? Low-power operation

- Active power management powers-down inactive units

- Standby mode

? Large, efficient on-chip caches

- Separate 8KB Instruction and 8KB Data caches

- Over 1800MB/sec bandwidth from internal caches

- 2-set associative

- Write-back and write-through support

- Cache locking to facilitate deterministic response

- High performance write protocols for graphics and data communications

? Bus compatible with ORION family

- System interfaces to 67 MHz, provides bandwidth up to 266 MB/sec

- Direct interface to 32-bit wide systems

- Synchronized to external reference clock for multimaster operation

? Improved real-time support

- Fast interrupt decode

- Optional cache locking