On-chip 4-word read buffer supports burst or simple block
reads
On-chip DMA arbiter
On-chip 24-bit timer
Boot from 8-bit, 16-bit, or 32-bit wide PROMs
Pin- and software-compatible family includes R3041, R3051,
R3052
™
, and R3081
™
Complete software support
— Optimizing compilers
— Real-time operating systems
— Monitors/debuggers
— Floating Point emulation software
— Page Description Languages
Master Pipeline Control
System Control
Coprocessor
Exception/Control
Registers
Bus Interface
Registers
PortSize
Register
Counter
Registers
Virtual Address
32
Physical Address Bus
SBrCond(3:2)
Int(5:3)
,
SInt(2:0)
Integer
CPU Core
General Registers
(32 x 32)
ALU
Shifter
Mult/Div Unit
Address Adder
PC Control
TC
32
Instruction
Cache
2kB
Data Bus
R3051 Superset
Bus Interface Unit
4-deep
Write
Buffer
Data
Unpack
Unit
Address/
Data
4-deep
Read
Buffer
Data
Pack
Unit
DMA
Ctrl
DMA
Arbiter
BIU
Control
Data
Cache
512B
Timing/ Interface
Control
Rd
/
Wr
SysClk
2905 drw 01
Ctrl
Figure 1. R3041 Block Diagram
RISController, R3041, R3051, R3052, R3081, ORION, IDT/sim, and IDT/kit are trademarks, and the IDT logo is a registered trademark of Integrated Device Technology, Inc.
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