Rainbow-electronics ATtiny43U Manuale Utente Scaricare il pdf (Pagina 97)

8048B–AVR–03/09

• Bit 1 – OCFnA: Output Compare Flag n A

The OCFnA bit is set when a Compare Match occurs between the Timer/Countern and the data

in OCRnA – Output Compare Registern A. OCFnA is cleared by hardware when executing the

corresponding interrupt handling vector. Alternatively, OCFnA is cleared by writing a logic one to

the flag. When the I-bit in SREG, OCIEnA (Timer/Countern Compare Match Interrupt Enable),

and OCFnA are set, the Timer/Countern Compare Match Interrupt is executed.

• Bit 0 – TOVn: Timer/Countern Overflow Flag

The bit TOVn is set when an overflow occurs in Timer/Countern. TOVn is cleared by hardware

when executing the corresponding interrupt handling vector. Alternatively, TOVn is cleared by

writing a logic one to the flag. When the SREG I-bit, TOIEn (Timer/Countern Overflow Interrupt

Enable), and TOVn are set, the Timer/Countern Overflow interrupt is executed.

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Rainbow-electronics ATtiny43U Manuale Utente Pagina 97