
68
8008H–AVR–04/11
ATtiny48/88
10.3.1
Alternate Functions of Port A
The Port A pins with alternate functions are shown in
Table 10-3.
The alternate pin configuration is as follows:
PCINT27 – Port A, Bit 3
PCINT27: Pin Change Interrupt source 27.
PCINT26 – Port A, Bit 2
PCINT26: Pin Change Interrupt source 26.
ADC7/PCINT25 – Port A, Bit 1
ADC7: PA1 can be used as ADC input Channel 7.
PCINT25: Pin Change Interrupt source 25.
ADC6/PCINT24 – Port A, Bit 0
ADC6: PA0 can be used as ADC input Channel 6.
PCINT24: Pin Change Interrupt source 24.
Table 10-3.
Port A Pins Alternate Functions
Port Pin
Alternate Function
PA3
PCINT27 (Pin Change Interrupt 27)
PA2
PCINT26 (Pin Change Interrupt 26)
PA1
ADC7 (ADC Input Channel 7)
PCINT25 (Pin Change Interrupt 25)
PA0
ADC6 (ADC Input Channel 6)
PCINT24 (Pin Change Interrupt 24)
Table 10-4.
Overriding Signals for Alternate Functions in PA[3:0]
Signal Name
PA3/PCINT27
PA2/PCINT26
PA1/ADC7/PCINT25
PA0/ADC6/PCINT24
PUOE
0
PUO
0
DDOE
0
DDOV
0
PVOE
0
PVOV
0
DIEOE
PCINT27
PCIE3
PCINT26
PCIE3
PCINT25 PCIE3 +
ADC7D
PCINT24 PCIE3 +
ADC6D
DIEOV
1
DI
PCINT27 INPUT
PCINT26 INPUT
PCINT25 INPUT
PCINT24 INPUT
AIO
–
ADC7 INPUT
ADC6 INPUT