Description
The IDT79RC4640 is a low-cost member of the Integrated Device Technology, Inc. RC4000 family, targeted to a variety of performancehungry embedded applications. The RC4640 continues the RC4000 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
   – 100MHz, 133MHz, 150MHz, 180MHz, 200MHz and 267MHz operating frequencies
   – 32-bit bus interface brings 64-bit power to 32-bit system cost
◆ High-performance DSP capability
   – 133.5 Million Integer Mul-Accumulate operations/sec @267MHz
   – 89 MFlops floating-point operations @267MHz
◆ High-performance microprocessor
   – 133.5 M Mul-Add/second @267MHz
   – 89 MFlops @267MHz
   – >640,000 dhrystone (2.1)/sec capability @267MHz (352 dhrystone MIPS)
◆ High level of integration
   – 64-bit, 267 MHz integer CPU
   – 8KB instruction cache; 8KB data cache
   – Integer multiply unit with 133.5M 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 3200MB/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 RC4000 family
   – System interfaces to 125MHz, provides bandwidth up to 500 MB/sec
   – Direct interface to 32-bit wide systems
   – Synchronized to external reference clock for multi- master operation
   – Socket compatible with IDT RC 64474 and RC64574
◆ Improved real-time support
   – Fast interrupt decode
   – Optional cache locking

Note: “R” refers to 5V parts; “RV” refers to 3.3V parts; “RC” refers to both