MPC8540 datasheet(28/1302 Pages) FREESCALE

28 / 1302 page

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

xxviii

Freescale Semiconductor

Contents

Paragraph

Number

Title

Page

Number

15.4.1.1.1

Basic Direct Mode ........................................................................................... 15-29

15.4.1.1.2

Basic Direct Single-Write Start Mode ............................................................. 15-30

15.4.1.1.3

Basic Chaining Mode ...................................................................................... 15-31

15.4.1.1.4

Basic Chaining Single-Write Start Mode ........................................................ 15-31

15.4.1.2

Extended DMA Mode Transfer ........................................................................... 15-32

15.4.1.2.1

Extended Direct Mode..................................................................................... 15-32

15.4.1.2.2

Extended Direct Single-Write Start Mode....................................................... 15-32

15.4.1.2.3

Extended Chaining Mode ................................................................................ 15-32

15.4.1.2.4

Extended Chaining Single-Write Start Mode .................................................. 15-33

15.4.1.3

External Control Mode Transfer.......................................................................... 15-33

15.4.1.4

Channel Continue Mode for Cascading Transfer Chains .................................... 15-34

15.4.1.4.1

Basic Mode ...................................................................................................... 15-35

15.4.1.4.2

Extended Mode................................................................................................ 15-35

15.4.1.5

Channel Abort...................................................................................................... 15-35

15.4.1.6

Bandwidth Control............................................................................................... 15-36

15.4.1.7

Channel State ....................................................................................................... 15-36

15.4.1.8

Illustration of Stride Size and Stride Distance..................................................... 15-36

15.4.2

DMA Transfer Interfaces ......................................................................................... 15-37

15.4.3

DMA Errors ............................................................................................................. 15-37

15.4.4

DMA Descriptors..................................................................................................... 15-37

15.4.5

Limitations and Restrictions .................................................................................... 15-40

15.5

DMA System Considerations ...................................................................................... 15-41

15.5.1

Unusual DMA Scenarios ......................................................................................... 15-43

15.5.1.1

DMA to e500 Core .............................................................................................. 15-43

15.5.1.2

DMA to Ethernet ................................................................................................. 15-44

15.5.1.3

DMA to Configuration and Control Registers..................................................... 15-44

15.5.1.4

DMA to I2C ......................................................................................................... 15-44

15.5.1.5

DMA to DUART ................................................................................................. 15-44

Chapter 16

PCI/PCI-X Bus Interface

16.1

Introduction.................................................................................................................... 16-1

16.1.1

Overview.................................................................................................................... 16-2

16.1.1.1

MPC8540 as a PCI/X Initiator............................................................................... 16-3

16.1.1.2

MPC8540 as a PCI/X Target ................................................................................. 16-4

16.1.2

Features ...................................................................................................................... 16-4

16.1.3

Modes of Operation ................................................................................................... 16-5

16.1.3.1

Host/Agent Modes ................................................................................................. 16-5

16.1.3.1.1

Host Mode ......................................................................................................... 16-6

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