Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller VFQFN 28 (4x4) 8-Bit 20 MHz I/O number 23

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– 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.

• ADC1/PCINT9 – Port C, Bit 1

– PC1 can also be used as ADC input Channel 1. The ADC input channel 1 uses analog power.

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

source.

• ADC0//CINT8 – Port C, Bit 0

– PC0 can also be used as ADC input Channel 0. The ADC input channel 0 uses analog power.

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

source.

The tables below relate the alternate functions of Port C to the overriding signals shown in Figure 18-5.

Table 18-7. Overriding Signals for Alternate Functions in PC6...PC4

(1)

Signal

Name

PC6/RESET/PCINT14 PC5/SCL/ADC5/PCINT13 PC4/SDA/ADC4/PCINT12

PUOE RSTDISBL TWEN TWEN

PUOV 1 PORTC5 • PUD PORTC4 • PUD

DDOE RSTDISBL TWEN TWEN

DDOV 0 SCL_OUT SDA_OUT

PVOE 0 TWEN TWEN

PVOV 0 0 0

DIEOE RSTDISBL + PCINT14 •

PCIE1

PCINT13 • PCIE1 + ADC5D PCINT12 • PCIE1 + ADC4D

DIEOV RSTDISBL PCINT13 • PCIE1 PCINT12 • PCIE1

DI PCINT14 INPUT PCINT13 INPUT PCINT12 INPUT

AIO RESET INPUT ADC5 INPUT / SCL INPUT ADC4 INPUT / SDA INPUT

Note: 1. When enabled, the 2-wire Serial Interface enables slew-rate controls on the output pins PC4

and PC5. This is not shown in the figure. In addition, spike filters are connected between the AIO outputs

shown in the port figure and the digital logic of the TWI module.

ATmega48PA/88PA/168PA

I/O-Ports

Datasheet Complete

DS40002011A-page 120