Preliminary
DD 2.X
PowerPC 750FX RISC Microprocessor
2. Overview
The PowerPC 750FX RISC Microprocessor, also called the 750FX, is targeted for high performance, low
power systems using a 60x bus. The 750FX also includes an internal 512KB L2 cache with on-board
Error Correction Circuitry (ECC).
2.1 Block Diagram
shows a block diagram of the PowerPC 750FX RISC Microprocessor.
Figure 2-1. PowerPC 750FX RISC Microprocessor Block Diagram
Control Unit
Completion
Instruction Fetch
Branch Unit
32KB I-Cache
with Parity
System
Unit
Dispatch
BHT /
BTIC
GPRs
FPRs
LSU
FPU
Rename
Buffers
FXU1
FXU2
Rename
Buffers
512KB
32KB D-Cache
with parity
L2 Tags
with parity
L2 Cache
w/ECC
Enhanced
60x
BIU
Body_750FX_DS_DD2.X.fm.2.0
June 9, 2003
2. Overview
Page 7 of 63
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