ATtiny261A datasheet(61/292 Pages) ATMEL

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8197A–AVR–10/09

ATtiny261A/461A/861A

10.2.1

Alternate Functions of Port A

The Port A pins with alternate function are shown in Table 10-3.

• Port A, Bit 7- ADC6/AIN0/PCINT7

• ADC6: Analog to Digital Converter, Channel 6.

• AIN0: Analog Comparator 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.

• PCINT7: Pin Change Interrupt source 8.

• Port A, Bit 6 - ADC5/AIN1/PCINT6

• ADC5: Analog to Digital Converter, Channel 5.

• AIN1: Analog Comparator 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.

• PCINT6: Pin Change Interrupt source 6.

Table 10-3.

Port B Pins Alternate Functions

Port Pin

Alternate Function

PA7

ADC6: ADC Input Channel 6

AIN0:

Analog Comparator Input

PCINT7: Pin Change Interrupt 0, Source 7

PA6

ADC5: ADC Input Channel 5

AIN1:

Analog Comparator Input

PCINT6: Pin Change Interrupt 0, Source 6

PA5

ADC4: ADC Input Channel 4

AIN2:

Analog Comparator Input

PCINT5: Pin Change Interrupt 0, Source 5

PA4

ADC3: ADC Input Channel 3

ICP0:

Timer/Counter0 Input Capture Pin

PCINT4: Pin Change Interrupt 0, Source 4

PA3

AREF: External Analog Reference

PCINT3: Pin Change Interrupt 0, Source 3

PA2

ADC2: ADC Input Channel 2

INT1:

External Interrupt 1 Input

USCK: USI Clock (Three Wire Mode)

SCL :

USI Clock (Two Wire Mode)

PCINT2: Pin Change Interrupt 0, Source 2

PA1

ADC1: ADC Input Channel 1

DO:

USI Data Output (Three Wire Mode)

PCINT1:Pin Change Interrupt 0, Source 1

PA0

ADC0: ADC Input Channel 0

DI:

USI Data Input (Three Wire Mode)

SDA:

USI Data Input (Two Wire Mode)

PCINT0: Pin Change Interrupt 0, Source 0

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