MPC8540 datasheet(102/1302 Pages) FREESCALE

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MPC8540 PowerQUICC III Integrated Host Processor Reference Manual, Rev. 1

1-8

Freescale Semiconductor

Overview

•

System access port

— Uses JTAG interface and a TAP controller to access entire system memory map

— Supports 32-bit accesses to configuration registers

— Supports cache-line burst accesses to main memory

— Supports large block (4-Kbyte) uploads and downloads

— Supports continuous bit streaming of entire block for fast upload and download

•

IEEE 1149.1-compliant, JTAG boundary scan

•

783 FC-PBGA package

1.3

MPC8540 Architecture Overview

The following sections describe the major functional units of the MPC8540.

1.3.1

e500 Core Overview

The MPC8540 uses the e500 microprocessor core complex. The e500 core has an internal PLL

that allows independent optimization of the operating frequencies. The core frequencies are

derived from either the primary PCI clock input or an external oscillator. For information

regarding the e500 core refer to the following documents:

•

EREF: A Reference for Freescale Semiconductor Book E and the e500 Core

•

PowerPC e500 Core Complex Reference Manual

•

PowerPC e500 Application Binary Interface User's Guide

NOTE

The e500 defines features that are not implemented on the MPC8540.

It also generally defines some features that the MPC8540 implements

more specifically. An understanding of these differences can be

critical to ensure proper operation. These differences are summarized

in Section 5.14, “MPC8540 Implementation Details,” in the

MPC8540 Integrated Processor Reference Manual.

The following is a brief list of some of the key features of the e500 core complex:

•

Implements full Book E 32-bit architecture

•

Implements additional instructions, registers, and interrupts defined by APUs. The SPE

provides an extensive instruction set for 64-bit vector integer, single-precision

floating-point, and fractional operations. The SPFP APU provides scalar (32-bit)

single-precision, floating-point instructions.

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