ATmega3290P datasheet(381/385 Pages) ATMEL

381 / 385 page

8021E–AVR–07/09

ATmega329P/3290P

16.10 Register Description .........................................................................................152

SPI – Serial Peripheral Interface ......................................................... 157

17.1 Features .............................................................................................................157

17.2 Overview ............................................................................................................157

17.3 SS Pin Functionality ...........................................................................................162

17.4 Data Modes ........................................................................................................162

17.5 Register Description ...........................................................................................164

USART0 ................................................................................................. 167

18.1 Features .............................................................................................................167

18.2 Overview ............................................................................................................167

18.3 Clock Generation ................................................................................................169

18.4 Frame Formats ...................................................................................................172

18.5 USART Initialization ...........................................................................................173

18.6 Data Transmission – The USART Transmitter ...................................................175

18.7 Data Reception – The USART Receiver ............................................................177

18.8 Asynchronous Data Reception ...........................................................................181

18.9 Multi-processor Communication Mode ...............................................................184

18.10 Register Description .........................................................................................186

18.11 Examples of Baud Rate Setting .......................................................................190

USI – Universal Serial Interface .......................................................... 195

19.1 Features .............................................................................................................195

19.2 Overview ............................................................................................................195

19.3 Functional Descriptions ......................................................................................196

19.4 Alternative USI Usage ........................................................................................202

19.5 Register Description ...........................................................................................203

Analog Comparator ............................................................................. 207

20.1 Overview ............................................................................................................207

20.2 Analog Comparator Multiplexed Input ................................................................207

20.3 Register Description ...........................................................................................208

Analog to Digital Converter ................................................................ 210

21.1 Features .............................................................................................................210

21.2 Overview ............................................................................................................210

21.3 Operation ............................................................................................................211

21.4 Starting a Conversion .........................................................................................212

ATmega3290P Datasheet(PDF) 381 Page - ATMEL Corporation