ATTINY24_1 Datasheet, PDF (232/236 Pages) ATMEL Corporation – 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash

7.3 Power Reduction Register ...............................................................................35
7.4 Minimizing Power Consumption ......................................................................35
7.5 Register Description ........................................................................................36
8 System Control and Reset .................................................................... 39
8.1 Resetting the AVR ...........................................................................................39
8.2 Reset Sources .................................................................................................40
8.3 Internal Voltage Reference ..............................................................................42
8.4 Watchdog Timer ..............................................................................................42
8.5 Register Description ........................................................................................45
9 Interrupts ................................................................................................ 48
9.1 Interrupt Vectors ..............................................................................................48
9.2 External Interrupts ...........................................................................................49
9.3 Register Description ........................................................................................51
10 I/O Ports .................................................................................................. 54
10.1 Ports as General Digital I/O .............................................................................55
10.2 Alternate Port Functions ..................................................................................58
10.3 Register Description ........................................................................................67
11 8-bit Timer/Counter0 with PWM ............................................................ 69
11.1 Features ..........................................................................................................69
11.2 Overview ..........................................................................................................69
11.3 Clock Sources .................................................................................................70
11.4 Counter Unit ....................................................................................................70
11.5 Output Compare Unit .......................................................................................71
11.6 Compare Match Output Unit ............................................................................73
11.7 Modes of Operation .........................................................................................74
11.8 Timer/Counter Timing Diagrams .....................................................................78
11.9 Register Description ........................................................................................80
12 16-bit Timer/Counter1 ............................................................................ 87
12.1 Features ..........................................................................................................87
12.2 Overview ..........................................................................................................87
12.3 Timer/Counter Clock Sources .........................................................................89
12.4 Counter Unit ....................................................................................................89
12.5 Input Capture Unit ...........................................................................................90
12.6 Output Compare Units .....................................................................................92
ii ATtiny24/44/84
8006H–AVR–10/09