Rainbow-electronics ATmega162V Manual de usuario descargar pdf (Pagina 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

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Rainbow-electronics ATmega162V Manual de usuario Pagina 319