Microchip Technology megaAVR 0 Series Manual page 6

21.3. Clocks.......................................................................................................................................256
21.4. RTC Functional Description..................................................................................................... 256
21.5. PIT Functional Description....................................................................................................... 257
21.6. Crystal Error Correction............................................................................................................259
21.7. Events...................................................................................................................................... 260
21.8. Interrupts.................................................................................................................................. 260
21.9. Sleep Mode Operation............................................................................................................. 261
21.10. Synchronization........................................................................................................................261
21.11. Register Summary - RTC......................................................................................................... 262
21.12. Register Description.................................................................................................................262
22. Universal Synchronous and Asynchronous Receiver and Transmitter (USART).. 280
22.1. Features................................................................................................................................... 280
22.2. Overview.................................................................................................................................. 280
22.3. Functional Description..............................................................................................................283
22.4. Register Summary - USARTn.................................................................................................. 298
22.5. Register Description................................................................................................................. 298
23. Serial Peripheral Interface (SPI)............................................................................317
23.1. Features................................................................................................................................... 317
23.2. Overview.................................................................................................................................. 317
23.3. Functional Description..............................................................................................................319
23.4. Register Summary - SPIn.........................................................................................................327
23.5. Register Description................................................................................................................. 327
24. Two-Wire Interface (TWI)...................................................................................... 334
24.1. Features................................................................................................................................... 334
24.2. Overview.................................................................................................................................. 334
24.3. Functional Description..............................................................................................................335
24.4. Register Summary - TWIn........................................................................................................349
24.5. Register Description................................................................................................................. 349
25. Cyclic Redundancy Check Memory Scan (CRCSCAN)........................................ 370
25.1. Features................................................................................................................................... 370
25.2. Overview.................................................................................................................................. 370
25.3. Functional Description..............................................................................................................371
25.4. Register Summary - CRCSCAN...............................................................................................374
25.5. Register Description................................................................................................................. 374
26. CCL - Configurable Custom Logic........................................................................ 378
26.1. Features................................................................................................................................... 378
26.2. Overview.................................................................................................................................. 378
26.3. Functional Description..............................................................................................................380
26.4. Register Summary - CCL......................................................................................................... 388
26.5. Register Description................................................................................................................. 388
27. Analog Comparator (AC)....................................................................................... 399
27.1. Features................................................................................................................................... 399
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2018 Microchip Technology Inc.
Datasheet Preliminary
®
megaAVR 0-Series
DS40002015A-page 6