Allwinner A20 - Table of Contents

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Table of Contents

Declaration .................................................................................................................................................... 2

Revision History............................................................................................................................................. 3

Table of Contents........................................................................................................................................... 4

Chapter 1 System ..................................................................................................................................... 9

1.1. Overview ................................................................................................................................ 10

1.2. A20 Block Diagram ................................................................................................................ 18

1.3. Memory Mapping ................................................................................................................... 19

1.4. CPU Configuration ................................................................................................................. 23

1.4.1. Overview ........................................................................................................................ 23

1.4.2. CPU Configuration Register List .................................................................................... 24

1.4.3. CPUCFG Register Description ...................................................................................... 25

1.5. CCU ....................................................................................................................................... 34

1.5.1. Overview ........................................................................................................................ 34

1.5.2. Clock Tree Diagram ....................................................................................................... 35

1.5.3. CCU Register List........................................................................................................... 35

1.5.4. CCU Register Description .............................................................................................. 38

1.6. System Boot .......................................................................................................................... 95

1.6.1. Overview ........................................................................................................................ 95

1.6.2. System Boot Diagram .................................................................................................... 96

1.7. System Control ...................................................................................................................... 97

1.7.1. Overview ........................................................................................................................ 97

1.7.2. System Control Register List ......................................................................................... 98

1.7.3. System Control Register ................................................................................................ 98

1.8. PWM .................................................................................................................................... 102

1.8.1. Overview ...................................................................................................................... 102

1.8.2. PWM Register List........................................................................................................ 103

1.8.3. PWM Register Description ........................................................................................... 103

1.9. Timer .................................................................................................................................... 108

1.9.1. Overview ...................................................................................................................... 108

1.9.2. Timer Register List ....................................................................................................... 109

1.9.3. Timer Register Description ........................................................................................... 110

1.10. High Speed Timer ................................................................................................................ 134

1.10.1. Overview ............................................................................................................... 134

1.10.2. High Speed Timer Register List ............................................................................ 135

1.10.3. High Speed Timer Controller Register .................................................................. 136

1.11. GIC ...................................................................................................................................... 147

1.11.1. Interrupt Source ............................................................................................................ 147

1.12. DMA ..................................................................................................................................... 152

1.12.1. Overview ............................................................................................................... 152

1.12.2. DMA Register List ................................................................................................. 153

1.12.3. DMA Controller Register Description .................................................................... 154

1.13. Audio Codec ........................................................................................................................ 171

1.13.1. Overview ............................................................................................................... 171

1.13.2. Audio Codec Block Diagram ................................................................................. 172

1.13.3. Audio Codec Register List .................................................................................... 172

1.13.4. Audio Codec Register Description ........................................................................ 173

1.14. LRADC ................................................................................................................................. 190

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