AT90USB646 datasheet(427/434 Pages) ATMEL

427 / 434 page

7593A–AVR–02/06

AT90USB64/128

Power Management and Sleep Modes ................................................. 52

7.1

Idle Mode ...........................................................................................................53

7.2

ADC Noise Reduction Mode ..............................................................................53

7.3

Power-down Mode .............................................................................................53

7.4

Power-save Mode ..............................................................................................53

7.5

Standby Mode ....................................................................................................54

7.6

Extended Standby Mode ....................................................................................54

7.7

Power Reduction Register .................................................................................55

7.8

Minimizing Power Consumption .........................................................................56

System Control and Reset .................................................................... 58

8.1

Internal Voltage Reference ................................................................................63

8.2

Watchdog Timer .................................................................................................63

Interrupts ................................................................................................ 69

9.1

Interrupt Vectors in AT90USB64/128 .................................................................69

I/O-Ports .................................................................................................. 73

10.1

Introduction ........................................................................................................73

10.2

Ports as General Digital I/O ...............................................................................74

10.3

Alternate Port Functions ....................................................................................78

10.4

External Interrupts ................................................................................. 95

Timer/Counter0, Timer/Counter1, and Timer/Counter3 Prescalers ... 99

12.1

Internal Clock Source .........................................................................................99

12.2

Prescaler Reset .................................................................................................99

12.3

External Clock Source .......................................................................................99

12.4

General Timer/Counter Control Register – GTCCR ........................................100

8-bit Timer/Counter0 with PWM .......................................................... 101

13.1

Overview ..........................................................................................................101

13.2

Timer/Counter Clock Sources ..........................................................................102

13.3

Counter Unit .....................................................................................................102

13.4

Output Compare Unit .......................................................................................103

13.5

Compare Match Output Unit ............................................................................105

13.6

Modes of Operation .........................................................................................106

13.7

Timer/Counter Timing Diagrams ......................................................................110

13.8

8-bit Timer/Counter Register Description .........................................................111

AT90USB646 Datasheet(PDF) 427 Page - ATMEL Corporation

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