Rainbow Electronics ATmega162V - Manual (Page 319)

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ATmega162/V
2513E–AVR–09/03
8-bit Timer/Counter2 with PWM and Asynchronous operation... 137
Overview........................................................................................................... 137
Timer/Counter Clock Sources........................................................................... 138
Counter Unit...................................................................................................... 139
Output Compare Unit........................................................................................ 139
Compare Match Output Unit ............................................................................. 141
Modes of Operation .......................................................................................... 142
Timer/Counter Timing Diagrams....................................................................... 146
8-bit Timer/Counter Register Description ......................................................... 148
Asynchronous operation of the Timer/Counter ................................................. 152
Timer/Counter Prescaler................................................................................... 156
Serial Peripheral Interface – SPI..................................................... 157
SS Pin Functionality.......................................................................................... 161
Data Modes ...................................................................................................... 164
USART .............................................................................................. 165
Dual USART ..................................................................................................... 165
Clock Generation .............................................................................................. 167
Frame Formats ................................................................................................. 170
USART Initialization.......................................................................................... 171
Data Transmission – The USART Transmitter ................................................. 172
Data Reception – The USART Receiver .......................................................... 174
Asynchronous Data Reception ......................................................................... 178
Multi-processor Communication Mode ............................................................. 181
Accessing UBRRH/
UCSRC Registers............................................................................................. 183
USART Register Description ............................................................................ 185
Examples of Baud Rate Setting........................................................................ 190
Analog Comparator ......................................................................... 194
JTAG Interface and On-chip Debug System ................................. 196
Features............................................................................................................ 196
Overview........................................................................................................... 196
Test Access Port – TAP.................................................................................... 196
TAP Controller .................................................................................................. 199
Using the Boundary-scan Chain ....................................................................... 199
Using the On-chip Debug system ..................................................................... 200
On-chip debug specific JTAG instructions........................................................ 201
On-chip Debug Related Register in I/O Memory .............................................. 201
Using the JTAG Programming Capabilities ...................................................... 201
Bibliography ...................................................................................................... 202