Powerpc Processor Core; Overview - Motorola MPC8240 User Manual

Chapter 5

PowerPC Processor Core

The MPC8240 contains an embedded version of the PowerPC 603e™ processor called the
processor core. This chapter provides an overview of the basic functionality of the
processor core. For detailed information regarding the processor refer to the following:
• MPC603e & EC603e User's Manual (those chapters that describe the programming
model, cache model, memory management model, exception model, and instruction
timing)
• MPC603e & EC603e Microprocessor User's Manual Errata (those sections that
pertain to the programming model, cache model, memory management model,
exception model, and instruction timing)
• PowerPC™ Microprocessor Family: The Programming Environments for 32-Bit
Microprocessors
This section describes the details of the processor core, provides a block diagram showing
the major functional units, and describes briefly how those units interact. At the end of this
chapter, there is a section that outlines the detailed differences between the processor core
and the MPC8240 processor.
The signals associated with the processor core are described in Chapter 2, "Signal
Descriptions and Clocking."

5.1 Overview

The processor core is a low-power implementation of the PowerPC microprocessor family
of reduced instruction set computing (RISC) microprocessors. The processor core
implements the 32-bit portion of the PowerPC architecture, which supports 32-bit effective
addresses.
Figure 5-1 is a block diagram of the processor core.
Chapter 5. PowerPC Processor Core 5-1