ATmega48 datasheet(75/340 Pages) ATMEL

75 / 340 page

7530H–AVR–02/09

ATmega48/88/168 Automotive

• SDA/ADC4/PCINT12 – Port C, Bit 4

SDA, 2-wire Serial Interface Data: When the TWEN bit in TWCR is set (one) to enable the 2-wire

Serial Interface, pin PC4 is disconnected from the port and becomes the Serial Data I/O pin for

the 2-wire Serial Interface. 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.

PC4 can also be used as ADC input Channel 4. Note that ADC input channel 4 uses digital

power.

PCINT12: Pin Change Interrupt source 12. The PC4 pin can serve as an external interrupt

source.

• ADC3/PCINT11 – Port C, Bit 3

PC3 can also be used as ADC input Channel 3. Note that 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. Note that ADC input channel 2 uses analog

power.

PCINT10: Pin Change Interrupt source 10. The PC2 pin can serve as an external interrupt

source.

• ADC1/PCINT9 – Port C, Bit 1

PC1 can also be used as ADC input Channel 1. Note that ADC input channel 1 uses analog

power.

PCINT9: Pin Change Interrupt source 9. The PC1 pin can serve as an external interrupt source.

• ADC0/PCINT8 – Port C, Bit 0

PC0 can also be used as ADC input Channel 0. Note that ADC input channel 0 uses analog

power.

PCINT8: Pin Change Interrupt source 8. The PC0 pin can serve as an external interrupt source.

ATmega48 Datasheet(PDF) 75 Page - ATMEL Corporation