ATmega325PA Atmel Corporation, ATmega325PA Datasheet - Page 675
ATmega325PA
Manufacturer Part Number
ATmega325PA
Description
Manufacturer
Atmel Corporation
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8285D–AVR–06/11
ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P
19 SPI – Serial Peripheral Interface ......................................................... 159
20 USART ................................................................................................... 169
21 USI – Universal Serial Interface .......................................................... 198
22 AC - Analog Comparator ..................................................................... 210
18.3Timer/Counter Clock Sources .............................................................................141
18.4Counter Unit ........................................................................................................141
18.5Output Compare Unit ..........................................................................................142
18.6Compare Match Output Unit ................................................................................144
18.7Modes of Operation .............................................................................................145
18.8Timer/Counter Timing Diagrams .........................................................................149
18.9Asynchronous operation of the Timer/Counter ....................................................151
18.10Timer/Counter Prescaler ...................................................................................153
18.11Register Description ..........................................................................................154
19.1Features ..............................................................................................................159
19.2Overview .............................................................................................................159
19.3SS Pin Functionality ............................................................................................164
19.4Data Modes .........................................................................................................165
19.5Register Description ............................................................................................166
20.1Features ..............................................................................................................169
20.2Overview .............................................................................................................169
20.3Clock Generation .................................................................................................171
20.4Frame Formats ....................................................................................................174
20.5USART Initialization ............................................................................................175
20.6Data Transmission – The USART Transmitter ....................................................177
20.7Data Reception – The USART Receiver .............................................................180
20.8Asynchronous Data Reception ............................................................................185
20.9Multi-processor Communication Mode ................................................................188
20.10Examples of Baud Rate Setting ........................................................................189
20.11Register Description ..........................................................................................193
21.1Features ..............................................................................................................198
21.2Overview .............................................................................................................198
21.3Functional Descriptions .......................................................................................199
21.4Alternative USI Usage .........................................................................................205
21.5Register Descriptions ..........................................................................................206
22.1Analog Comparator Multiplexed Input .................................................................211
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