Datasheet

17.2. Features................................................................................................................................... 172
17.3. Block Diagram.......................................................................................................................... 174
17.4. Signal Description.................................................................................................................... 174
17.5. Product Dependencies.............................................................................................................174
17.6. Functional Description..............................................................................................................176
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....................................................................................................................245
18.8. Register Description................................................................................................................. 245
19. RTC – Real-Time Counter.....................................................................................256
19.1. Overview.................................................................................................................................. 256
19.2. Features................................................................................................................................... 256
19.3. Block Diagram.......................................................................................................................... 257
19.4. Signal Description.................................................................................................................... 257
19.5. Product Dependencies............................................................................................................. 257
19.6. Functional Description..............................................................................................................259
19.7. Register Summary....................................................................................................................265
19.8. Register Description................................................................................................................. 267
20. DMAC – Direct Memory Access Controller........................................................... 300
20.1. Overview.................................................................................................................................. 300
20.2. Features................................................................................................................................... 300
20.3. Block Diagram.......................................................................................................................... 302
20.4. Signal Description.................................................................................................................... 302
20.5. Product Dependencies.............................................................................................................302
20.6. Functional Description..............................................................................................................303
20.7. Register Summary....................................................................................................................324
20.8. Register Description................................................................................................................. 325
20.9. Register Summary - SRAM...................................................................................................... 357
20.10. Register Description - SRAM................................................................................................... 357
21. EIC – External Interrupt Controller........................................................................ 365
21.1. Overview.................................................................................................................................. 365
21.2. Features................................................................................................................................... 365
21.3. Block Diagram.......................................................................................................................... 365
21.4. Signal Description.................................................................................................................... 366
21.5. Product Dependencies.............................................................................................................366
21.6. Functional Description..............................................................................................................367
21.7. Register Summary....................................................................................................................372
SAM D21 Family
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40001882D-page 5