IDT79R4700
64-Bit RISC Microprocessor
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Available at 80-200MHz, with mode bit dependent output
clock frequencies
Features
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True 64-bit microprocessor
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64GB physical address space
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64-bit integer operations
64-bit floating-point operations
64-bit registers
Processor family for a wide variety of embedded
applications
64-bit virtual address space
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LAN switches
Routers
Color printers
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High-performance microprocessor
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260 Dhrystone MIPS at 200MHz
100 peak MFLOP/s at 200MHz
Two-way set associative caches
Simple 5-stage pipeline
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Description
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The IDT79R4700 64-bit RISC Microprocessor is both software and
pin-compatible with the R4XXX processor family. With 64-bit processing
capabilities, the R4700 provides more computational power and data
movement bandwidth than is delivered to typical embedded systems by
32-bit processors.
High level of integration
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64-bit, 200 MHz integer CPU
64-bit floating-point unit
16KB instruction cache
16KB data cache
Flexible MMU with large, fully associative TLB
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The R4700 is upwardly software compatible with the IDT79R3000™
microprocessor family, including the IDTRISController™ 79R3051™,
R3052™, R3041™, R3081™ as well as the R4640™, R4650™, RC64474/
475™ and R5000™. An array of development tools facilitates rapid
development of R4700-based systems, allowing a variety of customers
access to the MIPS Open Architecture philosophy.
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Low-power operation
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3.3V power supply, for the “RV” part
5V power supply, for the “R” part
Dynamic power management
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Standby mode reduces internal power
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Fully software & pin-compatible with 40XX Processor Family
Available in 179-pin PGA or 208-pin QFP
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Block Diagram
Data Tag A
Data Set A
Instruction Set A
DTLB Physical
Data Tag B
Store Buffer
SysAD
Instruction Select
Write Buffer
Read Buffer
Address Buffer
Instruction Tag A
ITLB Physical
Instruction Register
Data Set B
DBus
Instruction Set B
Instruction Tag B
IBus
Control
AuxTag
Tag
Load Aligner
Floating-point
Register File
Joint TLB
Integer Register File
Integer/Address Adder
Data TLB Virtual
Shifter/Store Aligner
Logic Unit
Unpacker/Packer
Floating-point
Add/Sub/Cvt/Div/Sqrt
Integer Divide
Coprocessor 0
DVA
PC Incrementer
Floating-point/Integer
Multiply
System/Memory
Control
Branch Adder
Instruction TLB Virtual
Program Counter
IVA
Phase Lock Loop, Clocks
The IDT logo is a registered trademark and RC32134, RC32364, RC64145, RC64474, RC64475, RC4650, RC4640, RC4600,RC4700 RC3081, RC3052, RC3051, RC3041, RISController, and RISCore are trade-
marks of Integrated Device Technology, Inc.
1 of 25
April 10, 2001
DSC 9096
2001 Integrated Device Technology, Inc.
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