attiny25v ATMEL Corporation, attiny25v Datasheet - Page 226

• Manufacturer Part Number: attiny25v
• Description: Microcontroller With 2/4/8k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

ii
ATtiny25/45/85
8
9
10 I/O Ports .................................................................................................. 55
11 8-bit Timer/Counter0 with PWM ............................................................ 67
12 8-bit Timer/Counter1 .............................................................................. 86
13 8-bit Timer/Counter1 in ATtiny15 Mode ............................................... 98
System Control and Reset .................................................................... 41
Interrupts ................................................................................................ 50
7.2
7.3
7.4
7.5
8.1
8.2
8.3
8.4
8.5
9.1
9.2
9.3
10.1
10.2
10.3
10.4
11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
11.9
12.1
12.2
12.3
Software BOD Disable .....................................................................................36
Power Reduction Register ...............................................................................37
Minimizing Power Consumption ......................................................................37
Register Description ........................................................................................38
Resetting the AVR ...........................................................................................41
Reset Sources .................................................................................................41
Internal Voltage Reference ..............................................................................44
Watchdog Timer ..............................................................................................44
Register Description ........................................................................................47
Interrupt Vectors in ATtiny25/45/85 .................................................................50
External Interrupts ...........................................................................................51
Register Description ........................................................................................52
Introduction ......................................................................................................55
Ports as General Digital I/O .............................................................................56
Alternate Port Functions ..................................................................................59
Register Description ........................................................................................66
Features ..........................................................................................................67
Overview ..........................................................................................................67
Timer/Counter0 Prescaler and Clock Sources ................................................68
Counter Unit ....................................................................................................70
Output Compare Unit .......................................................................................71
Compare Match Output Unit ............................................................................72
Modes of Operation .........................................................................................74
Timer/Counter Timing Diagrams .....................................................................78
Register Description ........................................................................................80
Timer/Counter1 Prescaler ...............................................................................86
Counter and Compare Units ............................................................................86
Register Description ........................................................................................92
2586K–AVR–01/08