Datasheet

24.6. Data Transmission – The USART Transmitter......................................................................... 190
24.7. Data Reception – The USART Receiver..................................................................................192
24.8. Asynchronous Data Reception.................................................................................................196
24.9. Multi-Processor Communication Mode.................................................................................... 199
24.10. Accessing UBRRH/UCSRC Registers..................................................................................... 200
24.11. Register Description................................................................................................................. 201
24.12. Examples of Baud Rate Setting............................................................................................... 210
25. TWI - Two-wire Serial Interface............................................................................. 214
25.1. Features................................................................................................................................... 214
25.2. Overview.................................................................................................................................. 214
25.3. Two-Wire Serial Interface Bus Definition..................................................................................216
25.4. Data Transfer and Frame Format.............................................................................................217
25.5. Multi-master Bus Systems, Arbitration and Synchronization....................................................220
25.6. Using the TWI...........................................................................................................................222
25.7. Multi-master Systems and Arbitration...................................................................................... 239
25.8. Register Description.................................................................................................................241
26. AC - Analog Comparator....................................................................................... 248
26.1. Overview.................................................................................................................................. 248
26.2. Analog Comparator Multiplexed Input......................................................................................248
26.3. Register Description.................................................................................................................249
27. ADC - Analog to Digital Converter.........................................................................253
27.1. Features................................................................................................................................... 253
27.2. Overview.................................................................................................................................. 253
27.3. Starting a Conversion...............................................................................................................255
27.4. Prescaling and Conversion Timing...........................................................................................255
27.5. Changing Channel or Reference Selection..............................................................................257
27.6. ADC Noise Canceler................................................................................................................ 258
27.7. ADC Conversion Result........................................................................................................... 262
27.8. Register Description.................................................................................................................263
28. BTLDR - Boot Loader Support – Read-While-Write Self-Programming................ 272
28.1. Features................................................................................................................................... 272
28.2. Overview.................................................................................................................................. 272
28.3. Application and Boot Loader Flash Sections............................................................................272
28.4. Read-While-Write and No Read-While-Write Flash Sections...................................................273
28.5. Boot Loader Lock Bits.............................................................................................................. 275
28.6. Entering the Boot Loader Program...........................................................................................276
28.7. Addressing the Flash During Self-Programming...................................................................... 277
28.8. Self-Programming the Flash.....................................................................................................278
28.9. Register Description.................................................................................................................285
29. MEMPROG- Memory Programming......................................................................288
29.1. Program and Data Memory Lock Bits...................................................................................... 288
29.2. Fuse Bits.................................................................................................................................. 289
29.3. Signature Bytes........................................................................................................................291
AVR 8-Bit Microcontroller
© 2017 Microchip Technology Inc.
Datasheet Complete
40001974A-page 6