RM7000A-1 Datasheet, PDF (1/2 Pages) PMC-Sierra, Inc – 64-Bit MIPS RISC Microprocessor with Integrated L2 Cache

RM7000A
64-Bit MIPS RISC Microprocessor with Integrated L2 Cache
FEATURES
• Dual-Issue symmetric superscalar
microprocessor
• 400MHz max CPU frequency
• Capable of issuing two instructions
per clock cycle
• Integrated primary and secondary
caches
• 16KB Instruction, 16KB Data, and
256KB on-chip secondary
• All are 4-way set associative with
32-byte line size
• Per-line locking in primary and
secondary caches
• Fast Packet Cache™ increases
system efficiency in networking
applications
• Integrated external cache controller
• Allows up to 8Mbyte of external
• cache for applications with large
• data sets
• High-performance system interface
• 1000 Mbyte per-second peak
throughput
• 125 MHz max. freq., multiplexed
address/data bus (SysAD)
• Supports two outstanding reads with
out-of-order return
• High-performance floating-point unit
• 800 MFLOPS maximum
• IEEE754 compliant single and
double precision floating-point
operations
• 64-bit MIPS 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 TLB
• 64/48 dual entries map 128/96
pages
• Variable page size
• Embedded application enhancements
• Fourteen fully prioritized vectored
interrupts-10 external, 2 internal, 2
software
• Specialized DSP integer Multiply-
Accumulate instructions
(MAD/MADU), and three-operand
Multiply instruction (MUL)
• I and D Test/Break-point (Watch)
registers for emulation and debug
• Performance counter for system
and software tuning and debug
PACKAGING
• Fully Static 0.18µ CMOS design
with dynamic power down logic
• 304 pin TBGA package, 31x31 mm
DEVELOPMENT TOOLS
• Operating Systems:
• Linux by MontaVista and Red Hat
• VxWorks by Wind River Systems
• Nucleus by Accelerated Technology
• Neutrino by QNX Software Systems
• Compiler Suites
• Algorithmics
• Green Hills Software
BLOCK DIAGRAM
64-bit Integer Unit
Dual-Issue Superscalar
Integer Multiplier
Instr. Dispatch
I-Cache
16KB, 4-way, lockable
System Control
PC Unit
MMU
Fully Assoc., 48 or 64 Entry
64-bit FP Unit
Double/Single IEEE754
D-Cache
16KB, 4-way, lockable
PMC- 2010739(R2)
Bus Interface Unit
SysA /D Bus
Int Ctlr
System Cache (L2)
256KB, 4-way, lockable
NMI, INT9 – INT0
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
© Copyright PMC-Sierra, Inc. 2001