Manual

iii
ATmega169V/L
2514A–AVR–08/02
Modes of Operation .......................................................................................... 128
Timer/Counter Timing Diagrams....................................................................... 132
8-bit Timer/Counter Register Description ......................................................... 134
Asynchronous operation of the Timer/Counter................................................. 137
Timer/Counter Prescaler................................................................................... 141
Serial Peripheral Interface – SPI...................................................... 142
SS Pin Functionality.......................................................................................... 146
Data Modes ...................................................................................................... 149
USART ............................................................................................... 150
Overview........................................................................................................... 150
Clock Generation .............................................................................................. 151
Frame Formats ................................................................................................. 154
USART Initialization.......................................................................................... 155
Data Transmission – The USART Transmitter ................................................. 157
Data Reception – The USART Receiver .......................................................... 160
Asynchronous Data Reception ......................................................................... 163
Multi-processor Communication Mode ............................................................. 167
USART Register Description ............................................................................ 168
Examples of Baud Rate Setting........................................................................ 173
Universal Serial Interface – USI....................................................... 177
Overview........................................................................................................... 177
Functional Descriptions .................................................................................... 178
Alternative USI Usage ...................................................................................... 183
USI Register Descriptions................................................................................. 183
Analog Comparator .......................................................................... 188
Analog Comparator Multiplexed Input .............................................................. 190
Analog to Digital Converter ............................................................. 191
Features............................................................................................................ 191
Operation.......................................................................................................... 192
Starting a Conversion ....................................................................................... 193
Prescaling and Conversion Timing................................................................... 194
Changing Channel or Reference Selection ...................................................... 197
ADC Noise Canceler......................................................................................... 198
ADC Conversion Result.................................................................................... 203
LCD Controller .................................................................................. 209
Features............................................................................................................ 209
Overview........................................................................................................... 209
Mode of Operation............................................................................................ 211
LCD Usage ....................................................................................................... 215