mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 131

• Manufacturer Part Number: mcf51ac256a
• Description: Mcf51ac Flexis
• Manufacturer: Freescale Semiconductor, Inc

Chapter 7
ColdFire Core
7.1
This section describes the organization of the Version 1 (V1) ColdFire
of the program-visible registers. For detailed information on instructions, see the ISA_C definition in the
ColdFire Family Programmer’s Reference Manual.
7.1.1
As with all ColdFire cores, the V1 ColdFire core is comprised of two separate pipelines decoupled by an
instruction buffer.
The instruction fetch pipeline (IFP) is a two-stage pipeline for prefetching instructions. The prefetched
instruction stream is then gated into the two-stage operand execution pipeline (OEP), that decodes the
Freescale Semiconductor
Introduction
Overview
Instruction
Execution
Operand
Pipeline
Pipeline
Fetch
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
DSOC
AGEX
IAG
IC
IB
Decode & Select,
Figure 7-1. V1 ColdFire Core Pipelines
Instruction Buffer
Operand Fetch
Generation,
Fetch Cycle
Instruction
Generation
Instruction
Address
Address
Execute
FIFO
®
processor core and an overview
Address [
Read Data[31:0]
Write Data[31:0]
23
:0]
7-1