Rainbow-electronics ATmega128RFA1 Manual do Utilizador descarregar pdf (Página 303)

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8266A-MCU Wireless-12/09

ATmega128RFA1

• Bit 5 – ICF5 - Timer/Counter5 Input Capture Flag

The Timer/Counter5 has only limited functionality. It does not have an Input Capture

pin. Therefore this bit has no useful meaning.

• Bit 4 – Res - Reserved Bit

This bit is reserved for future use. A read access always will return zero. A write access

does not modify the content.

• Bit 3 – OCF5C - Timer/Counter5 Output Compare C Match Flag

This flag is set in the timer clock cycle after the counter (TCNT5) value matches the

Output Compare Register C (OCR5C). Note that a Forced Output Compare (FOC5C)

strobe will not set the OCF5C Flag. OCF5C is automatically cleared when the Output

Compare Match C Interrupt Vector is executed. Alternatively, OCF5C can be cleared by

writing a logic one to its bit location.

• Bit 2 – OCF5B - Timer/Counter5 Output Compare B Match Flag

This flag is set in the timer clock cycle after the counter (TCNT5) value matches the

Output Compare Register B (OCR5B). Note that a Forced Output Compare (FOC5B)

strobe will not set the OCF5B Flag. OCF5B is automatically cleared when the Output

Compare Match B Interrupt Vector is executed. Alternatively, OCF5B can be cleared by

writing a logic one to its bit location.

• Bit 1 – OCF5A - Timer/Counter5 Output Compare A Match Flag

This flag is set in the timer clock cycle after the counter (TCNT5) value matches the

Output Compare Register A (OCR5A). Note that a Forced Output Compare (FOC5A)

strobe will not set the OCF5A Flag. OCF5A is automatically cleared when the Output

Compare Match A Interrupt Vector is executed. Alternatively, OCF5A can be cleared by

writing a logic one to its bit location.

• Bit 0 – TOV5 - Timer/Counter5 Overflow Flag

The setting of this flag is dependent of the WGM53:0 bits setting of the Timer/Counter5

Control Register. In Normal and CTC modes, the TOV5 Flag is set when the timer

overflows. TOV5 is automatically cleared when the Timer/Counter5 Overflow Interrupt

Vector is executed. Alternatively, TOV5 can be cleared by writing a logic one to its bit

location.

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