ATtiny43U datasheet(70/182 Pages) ATMEL

70 / 182 page

8048B–AVR–03/09

ATtiny43U

11.3.1

Alternate Functions of Port A

The Port A pins with alternate function are shown in Table 11-3 on page 70.

• Port A, Bit 0 – ADC0/PCINT0

ADC0: Analog to Digital Converter, Channel 0.

PCINT0: Pin Change Interrupt source 0. The PA0 pin can serve as an external interrupt source

for pin change interrupt 0.

• Port A, Bit 1 – ADC1/PCINT1

ADC1: Analog to Digital Converter, Channel 1.

PCINT1: Pin Change Interrupt source 1. The PA1 pin can serve as an external interrupt source

for pin change interrupt 0.

• Port A, Bit 2 – ADC2/PCINT2

ADC2: Analog to Digital Converter, Channel 2.

PCINT2: Pin Change Interrupt source 2. The PA2 pin can serve as an external interrupt source

for pin change interrupt 0.

• Port A, Bit 3 – ADC3/PCINT3

ADC3: Analog to Digital Converter, Channel 3.

PCINT3: Pin Change Interrupt source 3. The PA3 pin can serve as an external interrupt source

for pin change interrupt 0.

Table 11-3.

Port A Pins Alternate Functions

Port Pin

Alternate Function

PA0

ADC0:

ADC input channel 0.

PCINT0:Pin change interrupt 0 source 0.

PA1

ADC1:

ADC input channel 1.

PCINT1:Pin change interrupt 0 source 1.

PA2

ADC2:

ADC input channel 2.

PCINT2: Pin change interrupt 0 source 2.

PA3

ADC3: ADC input channel 3.

PCINT3: Pin change interrupt 0 source 3.

PA4

AIN0:

Analog Comparator Positive Input.

PCINT4: Pin change interrupt 0 source 4.

PA5

AIN1:

Analog Comparator Negative Input.

PCINT5: Pin change interrupt 0 source 5.

PA6

PCINT6: Pin change interrupt 0 source 6.

CLKI:

External Clock Input.

PA7

RESET: Reset pin.

dW:

debugWire I/O.

PCINT7: Pin change interrupt 0 source 7

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