Datasheet
IBM PowerPC 750GX RISC Microprocessor
DD1.X
2. Overview
The IBM PowerPC 750GX RISC Microprocessor, also called the 750GX, is targeted for high-performance,
low-power systems using a 60× bus. The 750GX also includes an internal 1-MB L2 cache with on-board
error correction circuitry (ECC).
2.1 Block Diagram
Figure 2-1. IBM PowerPC 750GX RISC Microprocessor Block Diagram
Control Unit
Instruction Fetch
Branch Unit
Completion
32-KB Instruction Cache
with Parity
BHT/
BTIC
System
Unit
Dispatch
General-
Purpose
Floating-
Point
Floating-
Point
Unit
Registers
(GPRs)
and
Rename
Buffers
Registers
(FPRs)
and
Rename
Buffers
Load/Store
Unit
(LSU)
FXU1
FXU2
(FPU)
Enhanced
60x
Bus
Interface
Unit
1-MB
L2 Cache
with ECC
L2 Tags
with Parity
32-KB Data Cache
with Parity
(BIU)
750GX_ds_body.fm SA14-2765-02
September 2, 2005
Overview
Page 13 of 73
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