Rainbow-electronics ATmega3290P_V Manual de usuario Pagina 371

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iii
ATmega329/3290/649/6490
2552H–AVR–11/06
Modes of Operation .......................................................................................... 117
Timer/Counter Timing Diagrams....................................................................... 124
16-bit Timer/Counter Register Description ....................................................... 126
8-bit Timer/Counter2 with PWM and Asynchronous Operation .. 133
Overview........................................................................................................... 133
Timer/Counter Clock Sources........................................................................... 134
Counter Unit...................................................................................................... 134
Output Compare Unit........................................................................................ 135
Compare Match Output Unit ............................................................................. 137
Modes of Operation .......................................................................................... 138
Timer/Counter Timing Diagrams....................................................................... 142
8-bit Timer/Counter Register Description ......................................................... 144
Asynchronous operation of the Timer/Counter................................................. 147
Timer/Counter Prescaler................................................................................... 150
SPI – Serial Peripheral Interface..................................................... 152
Overview........................................................................................................... 152
SS
Pin Functionality.......................................................................................... 157
Data Modes ...................................................................................................... 160
USART0 ............................................................................................ 161
Overview........................................................................................................... 161
Clock Generation.............................................................................................. 162
Frame Formats ................................................................................................. 165
USART Initialization.......................................................................................... 166
Data Transmission – The USART Transmitter ................................................. 168
Data Reception – The USART Receiver .......................................................... 171
Asynchronous Data Reception ......................................................................... 174
Multi-processor Communication Mode ............................................................. 178
USART Register Description ............................................................................ 179
Examples of Baud Rate Setting........................................................................ 183
USI – Universal Serial Interface...................................................... 187
Overview........................................................................................................... 187
Functional Descriptions .................................................................................... 188
Alternative USI Usage ...................................................................................... 194
USI Register Descriptions................................................................................. 195
Analog Comparator ......................................................................... 200
Overview........................................................................................................... 200
Analog Comparator Multiplexed Input .............................................................. 202
Analog to Digital Converter ............................................................ 203
Features............................................................................................................ 203
Operation .......................................................................................................... 204
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