Rainbow-electronics ATmega8515L Instrukcja Użytkownika Strona 220

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ATmega8515(L)
2512A–AVR–04/02
Internal Voltage Reference ................................................................................. 47
Watchdog Timer ................................................................................................. 47
TimedSequencesforChanging the Configuration of the Watchdog Timer ....... 50
Interrupts............................................................................................. 51
InterruptVectors in ATmega8515....................................................................... 51
I/O Ports............................................................................................... 56
Introduction ......................................................................................................... 56
Ports asGeneralDigitalI/O ................................................................................ 57
Alternate Port Functions ..................................................................................... 61
RegisterDescription forI/O Ports ....................................................................... 72
External Interrupts.............................................................................. 74
8-bit Timer/Counter0 with PWM......................................................... 77
Overview............................................................................................................. 77
Timer/CounterClock Sources............................................................................. 78
CounterUnit........................................................................................................ 78
Output Compare Unit.......................................................................................... 79
Compare Match Output Unit ............................................................................... 81
Modes ofOperation ............................................................................................ 82
Timer/Counter Timing Diagrams......................................................................... 86
8-bit Timer/Counter RegisterDescription ........................................................... 87
Timer/Counter0 and Timer/Counter1 Prescalers............................. 92
16-bit Timer/Counter1......................................................................... 94
Overview............................................................................................................. 94
Accessing 16-bit Registers ................................................................................. 97
Timer/CounterClock Sources........................................................................... 100
CounterUnit...................................................................................................... 100
Input Capture Unit............................................................................................. 101
Output Compare Units ...................................................................................... 103
Compare Match Output Unit ............................................................................. 105
Modes ofOperation .......................................................................................... 106
Timer/Counter Timing Diagrams....................................................................... 114
16-bit Timer/Counter RegisterDescription ....................................................... 116
Serial Peripheral Interface SPI...................................................... 123
SS Pin Functionality.......................................................................................... 127
Data Modes ...................................................................................................... 130
USART ............................................................................................... 131
Single USART................................................................................................... 131
Clock Generation .............................................................................................. 133
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