Upwardly software compatible with IDT RISController
Family
◆
Easily upgradable to 64-bit system
◆
◆
IDT79RC4640
™
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
Block Diagram
267 MHz 64-bit CPU
64-bit Register File
64-bit Adder
System Control Coprocessor
Address Translation/
Cache Attribute Control
89 MFlops Single-Precision FPA
FP Register File
Pipeline Control
Load Aligner
Store Aligner
Logic Unit
High-Performance
Integer Multiply
Exception Management
Functions
Pipeline Control
Pack/Unpack
FP Add/Sub/Cvt/
Div/Sqrt
FP Multiply
Control Bus
Data Bus
Instruction Bus
Instruction Cache
Set A
(Lockable)
Instruction Cache
Set B
32-bit
Synchronized
System Interface
Data Cache
Set A
(Lockable)
Data Cache
Set B
The IDT logo is a trademark and RC4600, RC4650, RC3081,RC3052,RC3051,RC3041 RISController, and RISCore are trademarks of Integrated Device Technology, Inc.
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