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7734Q–AVR–02/12
AT90PWM81/161
ADC5/ACMP2/INT1/SCK – Bit 5
ADC5: Analog to Digital Converter, input channel 5.
ACMP2: Analog Comparator 2 Positive Input. Configure the port pin as input with the internal
pull-up switched off to avoid the digital port function from interfering with the function of the Ana-
log Comparator.
INT1: External Interrupt source 1. This pin can serve as an external interrupt source to the MCU.
SCK: Master Clock output, Slave Clock input pin for SPI channel. When the SPI is enabled as a
slave, this pin is configured as an input regardless of the setting of DDB5. When the SPI is
enabled as a master, the data direction of this pin is controlled by DDB5. When the pin is forced
to be an input, the pull-up can still be controlled by the PORTB5 bit.
MOSI/ADC3/ACMPM– Bit 4
MOSI: SPI Master Data output, Slave Data input for SPI channel. When the SPI is enabled as a
slave, this pin is configured as an input regardless of the setting of DDB4 When the SPI is
enabled as a master, the data direction of this pin is controlled by DDB4. When the pin is forced
to be an input, the pull-up can still be controlled by the PORTB4 and PUD bits.
ADC3: Analog to Digital Converter, input channel 3.
ACMPM: Analog Comparators Negative Input. Configure the port pin as input with the internal
pull-up switched off to avoid the digital port function from interfering with the function of the Ana-
log Comparator.
PSCOUTR1/ADC2/ACMP2M– Bit 3
PSCOUTR1: Output 1 of PSCR.
ADC2: Analog to Digital Converter, input channel 2.
ACMP2M: Analog Comparator 2 Negative Input. Configure the port pin as input with the internal
pull-up switched off to avoid the digital port function from interfering with the function of the Ana-
log Comparator.
INT0/PSCOUT21 – Bit 2
INT0: External Interrupt source 0. This pin can serve as an external interrupt source to the MCU.
PSCOUT21: Output 1 of PSC 2.
PSCOUT20 – Bit 1
PSCOUT20: Output 0 of PSC 2.
T1/PSCOUT23/ACMP3_OUT – Bit 0
T1: Timer/Counter1 counter source.
PSCOUT23: Output 3 of PSC 2.
ACMP3_OUT: Analog Comparator3 Output.