Datasheet

341
7810C–AVR–10/12
Atmel ATmega328P [Preliminary]
20.8 Register Description ......................................................................................203
21 2-wire Serial Interface .......................................................................... 206
21.1 Features ........................................................................................................206
21.2 2-wire Serial Interface Bus Definition ............................................................206
21.3 Data Transfer and Frame Format ..................................................................208
21.4 Multi-master Bus Systems, Arbitration and Synchronization .........................211
21.5 Overview of the TWI Module .........................................................................213
21.6 Using the TWI ................................................................................................215
21.7 Transmission Modes .....................................................................................219
21.8 Multi-master Systems and Arbitration ............................................................232
21.9 Register Description ......................................................................................233
22 Analog Comparator ............................................................................. 238
22.1 Overview ........................................................................................................238
22.2 Analog Comparator Multiplexed Input ...........................................................238
22.3 Register Description ......................................................................................239
23 Analog-to-Digital Converter ................................................................ 242
23.1 Features ........................................................................................................242
23.2 Overview ........................................................................................................242
23.3 Starting a Conversion ....................................................................................244
23.4 Prescaling and Conversion Timing ................................................................245
23.5 Changing Channel or Reference Selection ...................................................248
23.6 ADC Noise Canceler .....................................................................................249
23.7 ADC Conversion Result .................................................................................254
23.8 Temperature Measurement ...........................................................................254
23.9 Register Description ......................................................................................256
24 debugWIRE On-chip Debug System .................................................. 261
24.1 Features ........................................................................................................261
24.2 Overview ........................................................................................................261
24.3 Physical Interface ..........................................................................................261
24.4 Software Break Points ...................................................................................262
24.5 Limitations of debugWIRE .............................................................................262
24.6 Register Description ......................................................................................262
25 Self-Programming the Flash, ATmega328P ...................................... 263
25.1 Overview ........................................................................................................263