242
9157C–AVR–03/12
Atmel ATtiny88 Automotive
6.5
External Clock .................................................................................................30
6.6
Clock Output Buffer .........................................................................................31
6.7
System Clock Prescaler ..................................................................................31
6.8
Register Description ........................................................................................32
7
Power Management and Sleep Modes ................................................. 34
7.1
Sleep Modes ....................................................................................................34
7.2
Software BOD Disable .....................................................................................35
7.3
Minimizing Power Consumption ......................................................................36
7.4
Register Description ........................................................................................37
8
System Control and Reset .................................................................... 40
8.1
Resetting the AVR ...........................................................................................40
8.2
Reset Sources .................................................................................................41
8.3
Internal Voltage Reference ..............................................................................43
8.4
Watchdog Timer ..............................................................................................43
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 .................................................................................................. 56
10.1
Introduction ......................................................................................................56
10.2
Ports as General Digital I/O .............................................................................57
10.3
Alternate Port Functions ..................................................................................61
10.4
Register Description ........................................................................................73
11
8-bit Timer/Counter0 .............................................................................. 76
11.1
Features ..........................................................................................................76
11.2
Overview ..........................................................................................................76
11.3
Timer/Counter Clock Sources .........................................................................77
11.4
Counter Unit ....................................................................................................78
11.5
Output Compare Unit .......................................................................................78
11.6
Modes of Operation .........................................................................................79
11.7
Timer/Counter Timing Diagrams .....................................................................80
11.8
8-bit Timer/Counter Register Description ........................................................82