ATA5771_09 ATMEL [ATMEL Corporation], ATA5771_09 Datasheet - Page 117

• Manufacturer Part Number: ATA5771_09
• Description: Microcontroller with UHF ASK/FSK Transmitter
• Manufacturer: ATMEL [ATMEL Corporation]

12.3.1
64
ATtiny24/44/84
Alternate Functions of Port A
The Port A pins with alternate function are shown in
Table 12-3.
• Port A, Bit 0 – ADC0/AREF/PCINT0
ADC0: Analog to Digital Converter, Channel 0
AREF: External Analog Reference for ADC. Pullup and output driver are disabled on PA0 when
the pin is used as an external reference or Internal Voltage Reference with external capacitor at
the AREF pin by setting (one) the bit REFS0 in the ADC Multiplexer Selection Register
(ADMUX).
PCINT0: Pin Change Interrupt source 0. The PA0 pin can serve as an external interrupt source
for pin change interrupt 0.
Port Pin
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
Port A Pins Alternate Functions
Alternate Function
ADC0: ADC input channel 0.
AREF: External analog reference.
PCINT0: Pin change interrupt 0 source 0.
ADC1:
AIN0:
PCINT1:Pin change interrupt 0 source 1.
ADC2:
AIN1:
PCINT2: Pin change interrupt 0 source 2.
T0:
PCINT3: Pin change interrupt 0 source 3.
ADC4:
USCK: USI Clock three wire mode.
SCL :
T1:
PCINT4: Pin change interrupt 0 source 4.
ADC5:
DO:
OC1B: Timer/Counter1 Compare Match B output.
PCINT5: Pin change interrupt 0 source 5.
ADC6:
DI:
SDA:
OC1A: Timer/Counter1 Compare Match A output.
PCINT6: Pin change interrupt 0 source 6.
ADC7:
OC0B: Timer/Counter0 Compare Match B output.
ICP1:
PCINT7: Pin change interrupt 0 source 7.
ADC3: ADC input channel 3.
ADC input channel 1.
Analog Comparator Positive Input.
ADC input channel 2.
Analog Comparator Negative Input.
Timer/Counter0 counter source.
ADC input channel 4.
USI Clock two wire mode.
Timer/Counter1 counter source.
ADC input channel 5.
USI Data Output three wire mode.
ADC input channel 6.
USI Data Input three wire mode.
USI Data Input two wire mode.
ADC input channel 7.
Timer/Counter1 Input Capture Pin.
.
Table 12-7 on page
68.
7701C–AVR–12/08