Atmega128(l) – Rainbow Electronics ATmega128L User Manual
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ATmega128(L)
2467B–09/01
ICF3 is automatically cleared when the Input Capture 3 interrupt vector is executed.
Alternatively, ICF3 can be cleared by writing a logic one to its bit location.
• Bit 4 - OCF3A: Timer/Counter 3, Output Compare A Match Flag
This flag is set in the timer clock cycle after the counter (TCNT3) value matches the Out-
put Compare Register A (OCR3A).
Note that a forced output compare (FOC3A) strobe will not set the OCF3A flag.
OCF3A is automatically cleared when the Output Compare Match 3 A interrupt vector is
executed. Alternatively, OCF3A can be cleared by writing a logic one to its bit location.
• Bit 3 - OCF3B: Timer/Counter 3, Output Compare B Match Flag
This flag is set in the timer clock cycle after the counter (TCNT3) value matches the Out-
put Compare Register B (OCR3B).
Note that a forced output compare (FOC3B) strobe will not set the OCF3B flag.
OCF3B is automatically cleared when the Output Compare Match 3 B interrupt vector is
executed. Alternatively, OCF3B can be cleared by writing a logic one to its bit location.
• Bit 2 - TOV3: Timer/Counter 3, Overflow Flag
The setting of this flag is dependent of the WGM3:0 bits setting. In normal and CTC
modes, the TOV3 flag is set when the timer overflows. Refer to
the TOV3 flag behavior when using another WGM3:0 bit setting.
TOV3 is automatically cleared when the Timer/Counter 3 Overflow interrupt vector is
executed. Alternatively, OCF3B can be cleared by writing a logic one to its bit location.
• Bit 1 - OCF3C: Timer/Counter 3, Output Compare C Match Flag
This flag is set in the timer clock cycle after the counter (TCNT3) value matches the Out-
put Compare Register C (OCR3C).
Note that a forced output compare (FOC3C) strobe will not set the OCF3C flag.
OCF3C is automatically cleared when the Output Compare Match 3 C interrupt vector is
executed. Alternatively, OCF3C can be cleared by writing a logic one to its bit location.
• Bit 0 - OCF1C: Timer/Counter 1, Output Compare C Match Flag
This flag is set in the timer clock cycle after the counter (TCNT1) value matches the Out-
put Compare Register C (OCR1C).
Note that a forced output compare (FOC1C) strobe will not set the OCF1C flag.
OCF1C is automatically cleared when the Output Compare Match 1 C interrupt vector is
executed. Alternatively, OCF1C can be cleared by writing a logic one to its bit location.