ATMEGA640 datasheet(163/436 Pages) MICROCHIP

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ATmega640/V-1280/V-1281/V-2560/V-2561/V [DATASHEET]

DS40002211A

17.11.40 TIFR5 – Timer/Counter5 Interrupt Flag Register

• Bit 5 – ICFn: Timer/Countern, Input Capture Flag

This flag is set when a capture event occurs on the ICPn pin. When the Input Capture Register (ICRn) is set by the

WGMn3:0 to be used as the TOP value, the ICFn Flag is set when the counter reaches the TOP value.

ICFn is automatically cleared when the Input Capture Interrupt Vector is executed. Alternatively, ICFn can be

cleared by writing a logic one to its bit location.

• Bit 3– OCFnC: Timer/Countern, Output Compare C Match Flag

This flag is set in the timer clock cycle after the counter (TCNTn) value matches the Output Compare Register C

(OCRnC).

Note that a Forced Output Compare (FOCnC) strobe will not set the OCFnC Flag.

OCFnC is automatically cleared when the Output Compare Match C Interrupt Vector is executed. Alternatively,

OCFnC can be cleared by writing a logic one to its bit location.

• Bit 2 – OCFnB: Timer/Counter1, Output Compare B Match Flag

This flag is set in the timer clock cycle after the counter (TCNTn) value matches the Output Compare Register B

(OCRnB).

Note that a Forced Output Compare (FOCnB) strobe will not set the OCFnB Flag.

OCFnB is automatically cleared when the Output Compare Match B Interrupt Vector is executed. Alternatively,

OCFnB can be cleared by writing a logic one to its bit location.

• Bit 1 – OCF1A: Timer/Counter1, Output Compare A Match Flag

This flag is set in the timer clock cycle after the counter (TCNTn value matches the Output Compare Register A

(OCRnA).

Note that a Forced Output Compare (FOCnA) strobe will not set the OCFnA Flag.

OCFnA is automatically cleared when the Output Compare Match A Interrupt Vector is executed. Alternatively,

OCFnA can be cleared by writing a logic one to its bit location.

• Bit 0 – TOVn: Timer/Countern, Overflow Flag

The setting of this flag is dependent of the WGMn3:0 bits setting. In Normal and CTC modes, the TOVn Flag is set

when the timer overflows. Refer to Table 17-2 on page 145 for the TOVn Flag behavior when using another

WGMn3:0 bit setting.

TOVn is automatically cleared when the Timer/Countern Overflow Interrupt Vector is executed. Alternatively, TOVn

can be cleared by writing a logic one to its bit location.

Bit

0x1A (0x3A)

–

–ICF5

–

OCF5C

OCF5B

OCF5A

TOV5

TIFR5

Read/Write

R/W

Initial Value

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