Realtek Ameba-D RTL872 D Series User Manual page 6

8.3.3 Register and Field Descriptions ..................................................................................................................................... 71
8.4 Programming the GPIO ........................................................................................................................................................ 85
8.4.1 Software Registers ........................................................................................................................................................ 85
8.4.2 Programming Considerations ....................................................................................................................................... 85
9 Direct Memory Access Controller (DMAC) .......................................................................................................................... 86
9.1 Product Overview ................................................................................................................................................................ 86
9.1.1 General Product Description ......................................................................................................................................... 86
9.1.2 Basic Definitions ........................................................................................................................................................... 88
9.1.3 Features ........................................................................................................................................................................ 90
9.2 Functional Description ......................................................................................................................................................... 92
9.2.1 Setup/Operation of DMA Transfers .............................................................................................................................. 92
9.2.2 Block Flow Controller and Transfer Type ...................................................................................................................... 92
9.2.3 Handshaking Interface ................................................................................................................................................. 93
9.2.4 Basic Interface Definitions ............................................................................................................................................ 93
9.2.5 Memory Peripherals ..................................................................................................................................................... 94
9.2.6 Handshaking Interface - Peripheral is Not Flow Controller .......................................................................................... 94
9.2.7 Handshaking Interface - Peripheral Is Flow Controller .............................................................................................. 100
9.2.8 Setting up Transfers .................................................................................................................................................... 102
9.2.9 Flow Control Configurations ....................................................................................................................................... 120
9.2.10 Peripheral Burst Transaction Requests ....................................................................................................................... 121
9.2.11 Generating Requests for the AHB Master Bus Interface ............................................................................................ 125
9.2.12 Arbitration for AHB Master Interface ......................................................................................................................... 127
9.2.13 Scatter/Gather ............................................................................................................................................................ 128
9.2.14 Endianness .................................................................................................................................................................. 130
9.2.15 AHB Transfer Error Handling ...................................................................................................................................... 130
9.3 Registers ............................................................................................................................................................................ 131
9.3.1 Register Memory Map ................................................................................................................................................ 131
9.3.2 Registers and Field Descriptions ................................................................................................................................. 136
9.4 Programming the DMAC .................................................................................................................................................... 170
9.4.1 Register Access ........................................................................................................................................................... 171
9.4.2 Illegal Register Access................................................................................................................................................. 171
9.4.3 DMA Transfer Types ................................................................................................................................................... 171
9.4.4 Programing Example .................................................................................................................................................. 176
9.4.5 Programming a Channel ............................................................................................................................................. 178
9.4.6 Disabling a Channel Prior to Transfer Completion...................................................................................................... 192
9.4.7 Defined-Length Burst Support on DMAC .................................................................................................................... 193
10 General Timers .............................................................................................................................................................. 194
10.1 Basic Timer ..................................................................................................................................................................... 194
10.1.1 Introduction ................................................................................................................................................................ 194
10.1.2 Features ...................................................................................................................................................................... 194
10.1.3 Block Diagram ............................................................................................................................................................ 194
10.1.4 Functional Description ................................................................................................................................................ 194
10.2 Pulse Mode Timer .......................................................................................................................................................... 195
10.2.1 Introduction ................................................................................................................................................................ 195
10.2.2 Features ...................................................................................................................................................................... 195
10.2.3 Block Diagram ............................................................................................................................................................ 196
10.2.4 Functional Description ................................................................................................................................................ 196
10.3 PWM Mode Timer .......................................................................................................................................................... 198
10.3.1 Introduction ................................................................................................................................................................ 198
10.3.2 Features ...................................................................................................................................................................... 198
10.3.3 Block Diagram ............................................................................................................................................................ 199
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Ameba-D User Manual
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