Datasheet

– PCINT14: Pin Change Interrupt source 14. The PC6 pin can serve as an external interrupt
source.
If PC6 is used as a reset pin, DDC6, PORTC6 and PINC6 will all read 0.
• SCL0/ADC5/PCINT13 – Port C, Bit 5
– SCL0: Two-wire Serial Interface0 Clock. When the TWEN bit in TWCR0 is set (one) to enable
the two-wire Serial Interface, pin PC5 is disconnected from the port and becomes the Serial
Clock I/O pin for the two-wire Serial Interface0. In this mode, there is a spike filter on the pin
to suppress spikes shorter than 50 ns on the input signal, and the pin is driven by an open
drain driver with slew-rate limitation.
– PCINT13: Pin Change Interrupt source 13. The PC5 pin can serve as an external interrupt
source.
– PC5 can also be used as ADC input Channel 5. The ADC input channel 5 uses digital power.
• SDA0/ADC4/PCINT12 – Port C, Bit 4
– SDA0: Two-wire Serial Interface0 Data. When the TWEN bit in TWCR0 is set (one) to enable
the two-wire Serial Interface, pin PC4 is disconnected from the port and becomes the Serial
Data I/O pin for the two-wire Serial Interface0. In this mode, there is a spike filter on the pin to
suppress spikes shorter than 50 ns on the input signal, and the pin is driven by an open drain
driver with slew-rate limitation.
– PCINT12: Pin Change Interrupt source 12. The PC4 pin can serve as an external interrupt
source.
– PC4 can also be used as ADC input Channel 4. The ADC input channel 4 uses digital power.
• ADC3/PCINT11 – Port C, Bit 3
– PC3 can also be used as ADC input Channel 3. The ADC input channel 3 uses analog power.
– PCINT11: Pin Change Interrupt source 11. The PC3 pin can serve as an external interrupt
source.
• ADC2/PCINT10 – Port C, Bit 2
– PC2 can also be used as ADC input Channel 2. The ADC input channel 2 uses analog power.
– PCINT10: Pin Change Interrupt source 10. The PC2 pin can serve as an external interrupt
source.
• SCK1/ADC1/PCINT9 – Port C, Bit 1
– PC1 can also be used as ADC input Channel 1. The ADC input channel 1 uses analog power.
– SCK1: Master Clock output, Slave Clock input pin for SPI1 channel. When the SPI1 is
enabled as a Slave, this pin is configured as an input regardless of the setting of DDB5. When
the SPI1 is enabled as a Master, the data direction of this pin is controlled by DDC1. When
the pin is forced by the SPI1 to be an input, the pull-up can still be controlled by the PORTC1
bit.
– PCINT9: Pin Change Interrupt source 9. The PC1 pin can serve as an external interrupt
source.
• ADC0/MISO1/PCINT8 – Port C, Bit 0
– PC0 can also be used as ADC input Channel 0. The ADC input channel 0 uses analog power.
– MISO1: Master1 Data input, Slave Data output pin for SPI1 channel. When the SPI1 is
enabled as a Master, this pin is configured as an input regardless of the setting of DDC0.
When the SPI1 is enabled as a Slave, the data direction of this pin is controlled by DDC0.
ATmega328PB
I/O-Ports
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40001906C-page 111