Datasheet

• ACMP0/PCINT23 – Bit 7
– ACMP0, Analog Comparator 0 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
Analog Comparator.
– PCINT23, Pin Change Interrupt 23.
• ADC3/ACMPN2/INT0/PCINT22 – Bit 6
– ADC3, Analog to Digital Converter, input channel 3.
– ACMPN2, 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 Analog Comparator.
– INT0, External Interrupt source 0. This pin can serve as an external interrupt source to the
MCU.
– PCINT22, Pin Change Interrupt 23.
• ADC2/ACMP2/PCINT21 – Bit 5
– ADC2, Analog to Digital Converter, input channel 2.
– ACMP2, Analog Comparator 1 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
Analog Comparator.
– PCINT21, Pin Change Interrupt 21.
• PCINT20/ADC1/RXD/RXLIN/ICP1/SCK_A – Bit 4
– ADC1, Analog to Digital Converter, input channel 1.
– RXD/RXLIN, LIN/UART Receive Pin. Receive Data (Data input pin for the LIN/UART). When
the LIN/UART receiver is enabled this pin is configured as an input regardless of the value of
DDRD4. When the UART forces this pin to be an input, a logical one in PORTD4 will turn on
the internal pull-up.
– ICP1, Input Capture Pin1: This pin can act as an input capture pin for Timer/Counter1.
– SCK_A: 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 DDD4. When the SPI
is enabled as a master, the data direction of this pin is controlled by DDD4. When the pin is
forced to be an input, the pull-up can still be controlled by the
– PORTD4 bit.
– PCINT20, Pin Change Interrupt 20.
• PCINT19/TXD/TXLIN/OC0A/SS/MOSI_A, Bit 3
– TXD/TXLIN, LIN/UART Transmit pin. Data output pin for the LIN/UART. When the LIN/UART
Transmitter is enabled, this pin is configured as an output regardless of the value of DDD3.
– OC0A, Output Compare Match A output: This pin can serve as an external output for the
Timer/Counter0 Output
– Compare A. The pin has to be configured as an output (DDD3 set “one”) to serve this
function. The OC0A pin is also the output pin for the PWM mode.
– SS: Slave Port Select input. When the SPI is enabled as a slave, this pin is configured as an
input regardless of the setting of DDD3. As a slave, the SPI is activated when this pin is
driven low. When the SPI is enabled as a master, the data direction of this pin is controlled by
DDD3. When the pin is forced to be an input, the pull-up can still be controlled by the
PORTD3 bit.
– MOSI_A: 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 DDD3 When the SPI
Atmel ATmega16M1/32M1/64M1 [DATASHEET]
Atmel-8209F-ATmega16M1/32M1/64M1_Datasheet_Complete-10/2016
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