Product Overview

The RM7965A is a high-performance 64-bit microprocessor with features including a seven-stage dual-issue pipeline, tightly coupled L1 and L2 caches, and sophisticated branch prediction for maintaining pipeline efficiency.

A 200 MHz 64-bit multiplexed system address and data bus (SysAD) enables a high-bandwidth I/O interface to a variety of system controllers providing connectivity to a wide range of networking peripherals. The RM7965A also contains a vectored and prioritized interrupt controller for versatile interrupt configurations.

On-chip EJTAG debug modules ensure smooth and easy debugging for both hardware and software by allowing single-step and state examination. The inclusion of a pipeline-rate branch instruction trace buffer facilitates debugging under operating conditions.

Benefits
  • High-performance MIPS-Powered processor
  • High-bandwidth I/O interface
  • On-chip debug support
  • Extensive third-party software and debug support via the MIPS ecosystem
  • CPU core with MIPS64-compatible Instruction Set Architecture that
  • 900 MHz to 1 GHz operation
  • >2100 Dhrystone 2.1 MIPS at 1 GHz
  • Dual-issue superscalar 7-stage pipeline
  • 16-KB, 4-way set associative L1 Instruction cache
  • 16-KB, 4-way set associative L1 Data cache
  • 256-KB, 4-way set associative L2 cache with industry best 5- cycle access latency
  • Error Checking and Correcting (ECC) on L2 cache
  • Fast Packet Cache to assist processing of packet data
  • 8K-entry branch prediction table
  • Fully associative 64-entry TLB with dual pages
  • High performance Floating Point unit (IEEE 754)
  • Fixed-point DSP instructions such as Multiply/Add, Multiply/Subtract, and 3 Operand Multiply
  • High-performance system interface
  • Multiple outstanding reads with out of order return
  • 1600 MB/s peak throughput
  • 200 MHz maximum frequency using HSTL signaling on the SysAD bus
  • Multiplexed address/data bus (SysAD) supports 1.5 V, 2.5 V, and 3.3 V I/O logic
  • Processor clock multipliers 2, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 10, 11, 12, 13, 14, 15, 16, 17
  • Integrated on-chip EJTAG controller
  • 64-entry dynamic Trace Buffer for use in real-time trace and debug
  • Two 32-bit virtually addressed Watch registers
  • Integrated performance counters
  • Contains 2 independent 32-bit counters
  • Counts over 30 processor events including mispredicted branches
  • Enables full characterization and analysis of application software
  • 256-pin CSBGA package (27x27 mm)

Typical Applications include:

  • Voice Gateways
  • Multiservice Access Platforms
  • DSLAMs/Access Concentrators
  • Remote Access Switches
  • Web Switches
  • Layer 3 Switches
  • Backbone Switches/Routers
  • RAIDs
  • Set Top Boxes
  • Networked Printers
  • Cellular Base Stations

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Data Sheet
      Version Issue Date
Locked PDF Document RM7965A-900UI/-900WI 900 MHz 64-bit Microprocessor Data Sheet [447 KB] PMC-2100294 5 2014-10-30
Locked PDF Document RM7965A-835W 835 MHz 64-bit Microprocessor Data Sheet [1.25 MB] PMC-2091461 1 2009-10-09
Locked PDF Document RM7900/RM7965/RM7935 Microprocessors Data Sheet [673 KB] PMC-2030581 11 2006-09-14
Locked PDF Document RM7965A Microprocessor Data Sheet [512 KB] PMC-2052355 4 2007-06-15