Datasheet

62
8197C–AVR–05/11
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