Datasheet

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24.4.5. Analog Comparator Status Register

Name: ACSR

Offset: 0x50

Reset: 0x0

Property:

R/W

Bit 7 6 5 4 3 2 1 0

AC3IF AC2IF AC1IF AC0IF AC3O AC2O AC1O AC0O

Access

Reset 0 0 0 0 0 0 0 0

Bit 7 – AC3IF: Analog Comparator 3 Interrupt Flag Bit

This bit is set by hardware when Comparator 3 output event triggers off the interrupt mode defined by

AC3IS1 and AC3IS0 bits in AC3CON register.

This bit is cleared by hardware when the corresponding interrupt vector is executed in case the AC3IE in

AC3CON register is set. Anyway, this bit is cleared by writing a logical one on it.

This bit can also be used to synchronize ADC or DAC conversions.

Bit 6 – AC2IF: Analog Comparator 2 Interrupt Flag Bit

This bit is set by hardware when Comparator 2 output event triggers off the interrupt mode defined by

AC2IS1 and AC2IS0 bits in AC2CON register.

This bit is cleared by hardware when the corresponding interrupt vector is executed in case the AC2IE in

AC2CON register is set. Anyway, this bit is cleared by writing a logical one on it.

This bit can also be used to synchronize ADC or DAC conversions.

Bit 5 – AC1IF: Analog Comparator 1 Interrupt Flag Bit

This bit is set by hardware when Comparator 1 output event triggers off the interrupt mode defined by

AC1IS1 and AC1IS0 bits in AC1CON register.

This bit is cleared by hardware when the corresponding interrupt vector is executed in case the AC1IE in

AC1CON register is set. Anyway, this bit is cleared by writing a logical one on it.

This bit can also be used to synchronize ADC or DAC conversions.

Bit 4 – AC0IF: Analog Comparator 0 Interrupt Flag Bit

This bit is set by hardware when Comparator 0 output event triggers off the interrupt mode defined by

AC0IS1 and AC0IS0 bits in AC0CON register.

This bit is cleared by hardware when the corresponding interrupt vector is executed in case the AC3IE in

AC3CON register is set. Anyway, this bit is cleared by writing a logical one on it.

This bit can also be used to synchronize ADC or DAC conversions.

Bit 3 – AC3O: AC3O bit is directly the output of the Analog Comparator 3.

Value Description

1 The output of the comparator is high.

0 The output comparator is low.

Bit 2 – AC2O: AC2O bit is directly the output of the Analog Comparator 2.

Atmel ATmega16M1/32M1/64M1 [DATASHEET]

Atmel-8209F-ATmega16M1/32M1/64M1_Datasheet_Complete-10/2016

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