Introduction - Freescale Semiconductor MCF54455 Reference Manual

Chapter 22
PCI Bus Controller
22.1

Introduction

This chapter details the operation of the PCI bus controller for the device. The PCI bus arbiter, included in
this module, is also detailed here. The PCI controller acts as a bridge between the PCI bus and the internal
system of the device. Figure 22-1
of the block.
The MCF54450 and MCF54451 devices do not contain a PCI bus controller.
22.1.1 Block Diagram
22.1.2 Overview
The peripheral component interface (PCI) bus is a high-performance bus with multiplexed address and
data lines, especially suitable for high data-rate applications.
Freescale Semiconductor
shows a high-level diagram that illustrates the functional organization
NOTE
PCI Controller
Configuration
Master Bus
Target
Master Bus
Initiator
Figure 22-1. PCI Block Diagram
PCI
Arbiter
External PCI_REQ/PCI_GNT
Req/Gnt
PCI
Controller
Configuration
Interface
External PCI Bus
Target
Interface
Initiator
Interface
22-1