ATMEGA48-15AZV データシートの表示（PDF） - Atmel Corporation
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ATMEGA48-15AZV Datasheet PDF : 340 Pages
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17.9 USART Register Description .........................................................................184
17.10 Examples of Baud Rate Setting .....................................................................188
18 USART in SPI Mode ............................................................................. 192
18.1 Overview ........................................................................................................192
18.2 Clock Generation ...........................................................................................192
18.3 SPI Data Modes and Timing ..........................................................................193
18.4 Frame Formats ..............................................................................................193
18.5 Data Transfer .................................................................................................196
18.6 USART MSPIM Register Description ............................................................198
18.7 AVR USART MSPIM vs. AVR SPI ................................................................200
19 2-wire Serial Interface .......................................................................... 201
19.1 Features ........................................................................................................201
19.2 2-wire Serial Interface Bus Definition ............................................................201
19.3 Data Transfer and Frame Format ..................................................................202
19.4 Multi-master Bus Systems, Arbitration and Synchronization .........................206
19.5 Overview of the TWI Module .........................................................................208
19.6 TWI Register Description ...............................................................................210
19.7 Using the TWI ................................................................................................214
19.8 Transmission Modes .....................................................................................218
19.9 Multi-master Systems and Arbitration ............................................................232
20 Analog Comparator ............................................................................. 233
20.1 Analog Comparator Multiplexed Input ...........................................................236
21 Analog-to-Digital Converter ................................................................ 237
21.1 Features ........................................................................................................237
21.2 Starting a Conversion ....................................................................................239
21.3 Prescaling and Conversion Timing ................................................................240
21.4 Changing Channel or Reference Selection ...................................................243
21.5 ADC Noise Canceler .....................................................................................244
21.6 ADC Conversion Result................................................................................. 249
22 debugWIRE On-chip Debug System .................................................. 254
22.1 Features ........................................................................................................254
22.2 Overview ........................................................................................................254
22.3 Physical Interface ..........................................................................................254
22.4 Software Break Points ...................................................................................255
336 Atmel ATmega48/88/168 Automotive
7530J–AVR–03/12
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