Rainbow-electronics ATmega8515L Instrukcja Użytkownika Pobierz pdf (Strona 91)

ATmega8515(L)

2512A–AVR–04/02

Timer/Counter Interrupt Flag

• Bit 1 – TOV0: Timer/Counter0 Overflow Flag

The bit TOV0 isset (one)when an overflow occurs in Timer/Counter0. TOV0 iscleared

by hardware when executing the corresponding interrupt handling vector.Alternatively,

TOV0 isclearedbywriting a logic one to the flag. When the SREG I-bit, TOIE0

(Timer/Counter0 OverflowInterrupt Enable), and TOV0 are set (one), the

Timer/Counter0 Overflow interruptis executed. In phase correctPWM mode, thisbit is

set when Timer/Counter0 changescounting direction at $00.

• Bit0–OCF0:OutputCompareFlag0

The OCF0 bit isset (one)when a comparematch occurs between theTimer/Counter0

and the data in OCR0 – Output CompareRegister0. OCF0isclearedbyhardware when

executing the corresponding interrupt handling vector.Alternatively, OCF0isclearedby

writing a logic one to the flag. When the I-bit in SREG, OCIE0 (Timer/Counter0 Com-

parematch Interrupt Enable), andOCF0are set (one), theTimer/Counter0 Compare

match Interruptis executed.

Bit 76543 210

TOV1 OCF1A OCF1B – ICF1 –TOV0OCF0 TIFR

Read/Write R/W R/W R/W R/W R/W R/W R/W R/W

Initial Value00000000

1 2 ... 86 87 88 89 90 91 92 93 94 95 96 ... 222 223

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Rainbow-electronics ATmega8515L Instrukcja Użytkownika Strona 91