17.1. Overview...................................................................................................................................173
17.2. Features................................................................................................................................... 173
17.3. Block Diagram.......................................................................................................................... 175
17.4. Signal Description.....................................................................................................................175
17.5. Product Dependencies............................................................................................................. 175
17.6. Functional Description..............................................................................................................177
17.7. Register Summary....................................................................................................................192
17.8. Register Description................................................................................................................. 194
18. WDT – Watchdog Timer........................................................................................ 237
18.1. Overview...................................................................................................................................237
18.2. Features................................................................................................................................... 237
18.3. Block Diagram.......................................................................................................................... 238
18.4. Signal Description.....................................................................................................................238
18.5. Product Dependencies............................................................................................................. 238
18.6. Functional Description..............................................................................................................239
18.7. Register Summary....................................................................................................................244
18.8. Register Description................................................................................................................. 244
19. RTC – Real-Time Counter..................................................................................... 255
19.1. Overview...................................................................................................................................255
19.2. Features................................................................................................................................... 255
19.3. Block Diagram.......................................................................................................................... 256
19.4. Signal Description.....................................................................................................................256
19.5. Product Dependencies............................................................................................................. 256
19.6. Functional Description..............................................................................................................258
19.7. Register Summary....................................................................................................................263
19.8. Register Description................................................................................................................. 266
20. DMAC – Direct Memory Access Controller........................................................... 299
20.1. Overview...................................................................................................................................299
20.2. Features................................................................................................................................... 299
20.3. Block Diagram.......................................................................................................................... 301
20.4. Signal Description.....................................................................................................................301
20.5. Product Dependencies............................................................................................................. 301
20.6. Functional Description..............................................................................................................302
20.7. Register Summary....................................................................................................................322
20.8. Register Description................................................................................................................. 323
20.9. Register Summary - SRAM...................................................................................................... 354
20.10. Register Description - SRAM................................................................................................... 354
21. EIC – External Interrupt Controller........................................................................ 362
21.1. Overview...................................................................................................................................362
21.2. Features................................................................................................................................... 362
21.3. Block Diagram.......................................................................................................................... 362
21.4. Signal Description.....................................................................................................................363
21.5. Product Dependencies............................................................................................................. 363
21.6. Functional Description..............................................................................................................364
21.7. Register Summary....................................................................................................................368
Atmel SAM D21E / SAM D21G / SAM D21J [DATASHEET]
Atmel-42181K-SAM-D21_Datasheet_Complete-09/2016
5
heruihung2019-12-14亲测可以使用！不错的资料。
