MEGA128CAN Datasheet, PDF (409/413 Pages) ATMEL Corporation – Microcontroller WITH 128K BYTES OF ISP FLASH AND CAN CONTROLLER

4250E–CAN–12/04
AT90CAN128
Modes of Operation .......................................................................................... 121
Timer/Counter Timing Diagrams....................................................................... 128
16-bit Timer/Counter Register Description ........................................................131
8-bit Timer/Counter2 with PWM and Asynchronous Operation ... 140
Features............................................................................................................ 140
Overview........................................................................................................... 140
Timer/Counter Clock Sources........................................................................... 142
Counter Unit...................................................................................................... 142
Output Compare Unit........................................................................................ 143
Compare Match Output Unit ..............................................................................145
Modes of Operation .......................................................................................... 145
Timer/Counter Timing Diagrams........................................................................150
8-bit Timer/Counter Register Description ..........................................................151
Asynchronous operation of the Timer/Counter2 ............................................... 154
Timer/Counter2 Prescaler..................................................................................158
Output Compare Modulator - OCM ................................................. 160
Overview........................................................................................................... 160
Description........................................................................................................ 160
Serial Peripheral Interface – SPI...................................................... 162
Features............................................................................................................ 162
SS Pin Functionality...........................................................................................167
Data Modes .......................................................................................................170
USART (USART0 and USART1)....................................................... 171
Features............................................................................................................ 171
Dual USART ..................................................................................................... 171
Overview........................................................................................................... 172
Clock Generation .............................................................................................. 173
Serial Frame ..................................................................................................... 175
USART Initialization.......................................................................................... 176
Data Transmission – USART Transmitter .........................................................178
Data Reception – USART Receiver...................................................................180
Asynchronous Data Reception ......................................................................... 184
Multi-processor Communication Mode ..............................................................187
USART Register Description .............................................................................189
Examples of Baud Rate Setting........................................................................ 195
Two-wire Serial Interface ................................................................. 199
Features............................................................................................................ 199
Two-wire Serial Interface Bus Definition........................................................... 199
Data Transfer and Frame Format ..................................................................... 200
Multi-master Bus Systems, Arbitration and Synchronization ............................ 202
Overview of the TWI Module .............................................................................205
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