ATMEGA165V_0608 Datasheet, PDF (333/337 Pages) ATMEL Corporation – 8-bit Microcontroller with 16K Bytes In-System Programmable Flash

2573F–AVR–08/06
ATmega165/V
Counter Unit...................................................................................................... 121
Output Compare Unit........................................................................................ 122
Compare Match Output Unit ............................................................................. 124
Modes of Operation .......................................................................................... 125
Timer/Counter Timing Diagrams....................................................................... 129
8-bit Timer/Counter Register Description ......................................................... 131
Asynchronous operation of the Timer/Counter ................................................. 134
Timer/Counter Prescaler................................................................................... 138
Serial Peripheral Interface – SPI..................................................... 139
SS Pin Functionality.......................................................................................... 144
Data Modes ...................................................................................................... 147
USART .............................................................................................. 148
Overview........................................................................................................... 148
Clock Generation .............................................................................................. 149
Frame Formats ................................................................................................. 152
USART Initialization.......................................................................................... 153
Data Transmission – The USART Transmitter ................................................. 155
Data Reception – The USART Receiver .......................................................... 158
Asynchronous Data Reception ......................................................................... 161
Multi-processor Communication Mode ............................................................. 165
USART Register Description ............................................................................ 166
Examples of Baud Rate Setting........................................................................ 171
USI – Universal Serial Interface...................................................... 175
Overview........................................................................................................... 175
Functional Descriptions .................................................................................... 176
Alternative USI Usage ...................................................................................... 181
USI Register Descriptions................................................................................. 181
Analog Comparator ......................................................................... 186
Analog Comparator Multiplexed Input .............................................................. 188
Analog to Digital Converter ............................................................ 189
Features............................................................................................................ 189
Operation .......................................................................................................... 190
Starting a Conversion ....................................................................................... 191
Prescaling and Conversion Timing ................................................................... 192
Changing Channel or Reference Selection ...................................................... 195
ADC Noise Canceler......................................................................................... 196
ADC Conversion Result.................................................................................... 200
JTAG Interface and On-chip Debug System ................................. 206
Overview........................................................................................................... 206
Test Access Port – TAP.................................................................................... 206
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