RM7000-250T View Datasheet(PDF) - PMC-Sierra

Part Name

Description

Manufacturer

RM7000-250T

RM7000™ Microprocessor with On-Chip Secondary Cache Datasheet Released

PMC-Sierra 

RM7000™ Microprocessor with On-Chip Secondary Cache Datasheet

Released

1 Features

• Dual Issue symmetric superscalar microprocessor with instruction prefetch optimized for

system level price/performance

• 200, 250, 266, 300 MHz operating frequency

• >500 Dhrystone 2.1 MIPS @ 300 MHz

• High-performance system interface

• 1000 MB per second peak throughput

• 125 MHz max. freq., multiplexed address/data

• Supports two outstanding reads with out-of-order return

• Processor clock multipliers 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 7, 8, 9

• Integrated primary and secondary caches — all are 4-way set associative with 32 byte line size

• 16 KB instruction, 16 KB data, 256 KB on-chip secondary

• Per line cache locking in primaries and secondary

• Fast Packet Cache™ increases system efficiency in

networking applications

• Integrated external cache controller (up to 8 MB)

• High-performance floating-point unit — 600 MFLOPS maximum

• Single cycle repeat rate for common single-precision operations and some double-pre-

cision operations

• Single cycle repeat rate for single-precision combined multiply-add operations

• Two cycle repeat rate for double-precision multiply and double-precision combined

multiply-add operations

• MIPS IV Superset Instruction Set Architecture

• Data PREFETCH instruction allows the processor to overlap cache miss latency and

instruction execution

• Single-cycle floating-point multiply-add

• Integrated memory management unit

• Fully associative joint TLB (shared by I and D translations)

• 64/48 dual entries map 128/96 pages

• Variable page size

• Embedded application enhancements

• Specialized DSP integer Multiply-Accumulate instructions, (MAD/MADU) and three-

operand multiply instruction (MUL)

• I&D Test/Break-point (Watch) registers for emulation & debug

• Performance counter for system and software tuning & debug

• Fourteen fully prioritized vectored interrupts - 10 external, 2 internal, 2 software

• Fully static CMOS design with dynamic power down logic

• RM5271 pin compatible, 304 pin TBGA package, 31x31 mm

Proprietary and Confidential to PMC-Sierra, Inc and for its Customer’s Internal Use

9

Document ID: PMC-2002175, Issue 1

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