DOC7707 datasheet(302/307 Pages) ETC1

302 / 307 page

7707F–AVR–11/10

AT90USB82/162

8.1 Idle Mode ...............................................................................................................42

8.2 Power-down Mode ................................................................................................42

8.3 Power-save Mode .................................................................................................42

8.4 Standby Mode .......................................................................................................42

8.5 Extended Standby Mode .......................................................................................42

8.6 Power Reduction Register .....................................................................................43

8.7 Minimizing Power Consumption ............................................................................44

System Control and Reset .................................................................... 46

9.1 Resetting the AVR .................................................................................................46

9.2 Reset Sources .......................................................................................................46

9.3 Power-on Reset .....................................................................................................47

9.4 External Reset .......................................................................................................48

9.5 Brown-out Detection ..............................................................................................49

9.6 Watchdog Reset ....................................................................................................50

9.7 USB Reset .............................................................................................................50

9.8 Internal Voltage Reference ....................................................................................52

9.9 Watchdog Timer ....................................................................................................52

Interrupts ................................................................................................ 63

10.1 Interrupt Vectors in AT90USB82/162 ..................................................................63

I/O-Ports .................................................................................................. 67

11.1 Introduction ..........................................................................................................67

11.2 Ports as General Digital I/O .................................................................................68

11.3 Alternate Port Functions ......................................................................................72

11.4 Register Description for I/O-Ports ........................................................................82

External Interrupts ................................................................................. 84

Timer/Counter0 and Timer/Counter1 Prescalers ................................ 88

8-bit Timer/Counter0 with PWM ............................................................ 90

14.1 Overview .............................................................................................................90

14.2 Timer/Counter Clock Sources .............................................................................91

14.3 Counter Unit ........................................................................................................91

14.4 Output Compare Unit ..........................................................................................92

14.5 Compare Match Output Unit ................................................................................94

14.6 Modes of Operation .............................................................................................95

14.7 Timer/Counter Timing Diagrams .........................................................................99

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