Datasheet

2
7682C–AUTO–04/08
AT90CAN32/64/128
5.10 System Clock Prescaler ....................................................................................44
6 Power Management and Sleep Modes ................................................. 46
6.1 Idle Mode ..........................................................................................................47
6.2 ADC Noise Reduction Mode .............................................................................47
6.3 Power-down Mode ............................................................................................47
6.4 Power-save Mode .............................................................................................47
6.5 Standby Mode ...................................................................................................48
6.6 Minimizing Power Consumption ........................................................................48
7 System Control and Reset .................................................................... 51
7.1 Reset .................................................................................................................51
7.2 Internal Voltage Reference ...............................................................................56
7.3 Watchdog Timer ................................................................................................57
7.4 Timed Sequences for Changing the Configuration of the Watchdog Timer ......59
8 Interrupts ................................................................................................ 60
8.1 Interrupt Vectors in AT90CAN32/64/128 ..........................................................60
8.2 Moving Interrupts Between Application and Boot Space ..................................64
9 I/O-Ports .................................................................................................. 66
9.1 Introduction .......................................................................................................66
9.2 Ports as General Digital I/O ..............................................................................67
9.3 Alternate Port Functions ...................................................................................71
9.4 Register Description for I/O-Ports .....................................................................89
10 External Interrupts ................................................................................. 93
11 Timer/Counter3/1/0 Prescalers ............................................................. 96
11.1 Overview ...........................................................................................................96
11.2 Timer/Counter0/1/3 Prescalers Register Description ........................................98
12 8-bit Timer/Counter0 with PWM ............................................................ 99
12.1 Features ............................................................................................................99
12.2 Overview ...........................................................................................................99
12.3 Timer/Counter Clock Sources .........................................................................100
12.4 Counter Unit ....................................................................................................100
12.5 Output Compare Unit ......................................................................................101
12.6 Compare Match Output Unit ...........................................................................103
12.7 Modes of Operation ........................................................................................104
12.8 Timer/Counter Timing Diagrams .....................................................................108