ATMEGA8L ATMEL [ATMEL Corporation], ATMEGA8L Datasheet - Page 298

• Manufacturer Part Number: ATMEGA8L
• Description: 8-bit AVR with 8K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

2
ATmega8(L)
System Control and Reset ................................................................ 35
Interrupts ............................................................................................ 44
I/O Ports.............................................................................................. 49
External Interrupts ............................................................................. 64
8-bit Timer/Counter0.......................................................................... 67
Timer/Counter0 and Timer/Counter1 Prescalers ............................ 72
16-bit Timer/Counter1........................................................................ 74
8-bit Timer/Counter2 with PWM and Asynchronous Operation .. 102
Internal Voltage Reference ................................................................................. 40
Watchdog Timer ................................................................................................. 41
Timed Sequences for Changing the Configuration of the Watchdog Timer ....... 43
Interrupt Vectors in ATmega8............................................................................. 44
Introduction ......................................................................................................... 49
Ports as General Digital I/O ................................................................................ 50
Alternate Port Functions ..................................................................................... 54
Register Description for I/O Ports ....................................................................... 63
Overview............................................................................................................. 67
Timer/Counter Clock Sources............................................................................. 68
Counter Unit........................................................................................................ 68
Operation ............................................................................................................ 68
Timer/Counter Timing Diagrams......................................................................... 69
8-bit Timer/Counter Register Description ........................................................... 70
Overview............................................................................................................. 74
Accessing 16-bit Registers ................................................................................. 77
Timer/Counter Clock Sources............................................................................. 80
Counter Unit........................................................................................................ 80
Input Capture Unit............................................................................................... 81
Output Compare Units ........................................................................................ 83
Compare Match Output Unit ............................................................................... 85
Modes of Operation ............................................................................................ 86
Timer/Counter Timing Diagrams......................................................................... 93
16-bit Timer/Counter Register Description ......................................................... 95
Overview........................................................................................................... 102
Timer/Counter Clock Sources........................................................................... 103
Counter Unit...................................................................................................... 104
Output Compare Unit........................................................................................ 105
Compare Match Output Unit ............................................................................. 107
Modes of Operation .......................................................................................... 108
Timer/Counter Timing Diagrams....................................................................... 113
2486M–AVR–12/03