Datasheet

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ATtiny25/45/85 [DATASHEET]
2586Q–AVR–08/2013
7.2 Software BOD Disable .....................................................................................35
7.3 Power Reduction Register ...............................................................................36
7.4 Minimizing Power Consumption ......................................................................36
7.5 Register Description ........................................................................................37
8 System Control and Reset .....................................................................39
8.1 Resetting the AVR ...........................................................................................39
8.2 Reset Sources .................................................................................................39
8.3 Internal Voltage Reference ..............................................................................42
8.4 Watchdog Timer ..............................................................................................42
8.5 Register Description ........................................................................................44
9 Interrupts .................................................................................................48
9.1 Interrupt Vectors in ATtiny25/45/85 .................................................................48
9.2 External Interrupts ...........................................................................................49
9.3 Register Description ........................................................................................51
10 I/O Ports ..................................................................................................53
10.1 Introduction ......................................................................................................53
10.2 Ports as General Digital I/O .............................................................................53
10.3 Alternate Port Functions ..................................................................................57
10.4 Register Description ........................................................................................64
11 8-bit Timer/Counter0 with PWM ............................................................65
11.1 Features ..........................................................................................................65
11.2 Overview ..........................................................................................................65
11.3 Timer/Counter0 Prescaler and Clock Sources ................................................66
11.4 Counter Unit ....................................................................................................68
11.5 Output Compare Unit .......................................................................................69
11.6 Compare Match Output Unit ............................................................................70
11.7 Modes of Operation .........................................................................................71
11.8 Timer/Counter Timing Diagrams ......................................................................76
11.9 Register Description ........................................................................................77
12 8-bit Timer/Counter1 ..............................................................................83
12.1 Timer/Counter1 Prescaler ...............................................................................83
12.2 Counter and Compare Units ............................................................................83
12.3 Register Description ........................................................................................89
13 8-bit Timer/Counter1 in ATtiny15 Mode ...............................................95
13.1 Timer/Counter1 Prescaler ...............................................................................95