Motorola ColdFire MCF5281 User Manual page 12

Motorola microcontroller user's manual
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Paragraph
Number
16.2
DMA Request Control (DMAREQC) .............................................................. 16-3
16.3
DMA Transfer Overview.................................................................................. 16-4
16.4
DMA Controller Module Programming Model................................................ 16-5
16.4.1
Source Address Registers (SAR0-SAR3) .................................................... 16-6
16.4.2
Destination Address Registers (DAR0-DAR3) ........................................... 16-6
16.4.3
16.4.4
DMA Control Registers (DCR0-DCR3)...................................................... 16-8
16.4.5
DMA Status Registers (DSR0-DSR3) ....................................................... 16-10
16.5
DMA Controller Module Functional Description .......................................... 16-11
16.5.1
16.5.2
Data Transfer Modes .................................................................................. 16-12
16.5.3
Channel Initialization and Startup .............................................................. 16-13
16.5.4
Data Transfer .............................................................................................. 16-14
16.5.5
Termination................................................................................................. 16-15
17.1
Overview........................................................................................................... 17-1
17.1.1
Features......................................................................................................... 17-1
17.2
Modes of Operation .......................................................................................... 17-2
17.2.1
Full and Half Duplex Operation ................................................................... 17-2
17.2.2
Interface Options........................................................................................... 17-2
17.2.3
Address Recognition Options ....................................................................... 17-3
17.2.4
Internal Loopback ......................................................................................... 17-3
17.3
FEC Top-Level Functional Diagram ................................................................ 17-4
17.4
Functional Description...................................................................................... 17-5
17.4.1
Initialization Sequence.................................................................................. 17-6
17.4.2
User Initialization (Prior to Asserting ECR[ETHER_EN]).......................... 17-6
17.4.3
Microcontroller Initialization........................................................................ 17-7
17.4.4
User Initialization (After Asserting ECR[ETHER_EN]) ............................. 17-7
17.4.5
Network Interface Options............................................................................ 17-8
17.4.6
FEC Frame Transmission ............................................................................. 17-9
17.4.7
FEC Frame Reception................................................................................. 17-10
17.4.8
Ethernet Address Recognition .................................................................... 17-11
17.4.9
Hash Algorithm........................................................................................... 17-13
17.4.10
Full Duplex Flow Control........................................................................... 17-16
17.4.11
Inter-Packet Gap (IPG) Time...................................................................... 17-17
17.4.12
Collision Handling...................................................................................... 17-17
17.4.13
Internal and External Loopback.................................................................. 17-17
17.4.14
Ethernet Error-Handling Procedure ............................................................ 17-18
17.5
Programming Model ....................................................................................... 17-20
xii
CONTENTS
Title
Chapter 17
Fast Ethernet Controller (FEC)
MCF5282 User's Manual
Page
Number
MOTOROLA

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