Table 10-10. Overriding Signals for Alternate Functions PD7..PD4
Signal
Name
PD7/AIN1
/PCINT23
PD6/AIN0/
OC0A/PCINT22
PD5/T1/OC0B/
PCINT21
PD4/XCK/
T0/PCINT20
PUOE
PUO
0
0
0
0
0
0
0
0
DDOE
DDOV
PVOE
PVOV
DIEOE
DIEOV
0
0
0
0
0
0
0
0
0
OC0A ENABLE
OC0B ENABLE
UMSEL
0
OC0A
OC0B
XCK OUTPUT
PCINT20 • PCIE2
1
PCINT23 • PCIE2
1
PCINT22 • PCIE2
1
PCINT21 • PCIE2
1
PCINT20 INPUT
XCK INPUT
T0 INPUT
PCINT21 INPUT
T1 INPUT
DI
PCINT23 INPUT
AIN1 INPUT
PCINT22 INPUT
AIN0 INPUT
AIO
–
–
Table 10-11. Overriding Signals for Alternate Functions in PD3..PD0
Signal
Name
PD3/OC2B/INT1/
PCINT19
PD2/INT0/
PCINT18
PD1/TXD/
PCINT17
PD0/RXD/
PCINT16
PUOE
PUO
0
0
0
0
0
0
0
TXEN
0
RXEN
0
PORTD0 • PUD
DDOE
DDOV
PVOE
PVOV
0
TXEN
1
RXEN
0
0
0
0
OC2B ENABLE
OC2B
TXEN
TXD
INT1 ENABLE +
PCINT19 • PCIE2
INT0 ENABLE +
PCINT18 • PCIE1
DIEOE
DIEOV
DI
PCINT17 • PCIE2
PCINT16 • PCIE2
1
1
1
1
PCINT19 INPUT
INT1 INPUT
PCINT18 INPUT
INT0 INPUT
PCINT16 INPUT
RXD
PCINT17 INPUT
–
AIO
–
–
–
80
ATmega48/88/168
2545E–AVR–02/05
MICROCHIP [ MICROCHIP ]
