Datasheet

Signal
Name
PB7/XTAL2/TOSC2/PCINT7
(1)
PB6/XTAL1/TOSC1/
PCINT6
(1)
PB5/SCK/PCINT5 PB4/MISO/PCINT4
DIEOE INTRC • EXTCK + AS2 + PCINT7
• PCIE0
INTRC + AS2 + PCINT6 •
PCIE0
PCINT5 • PCIE0 PCINT4 • PCIE0
DIEOV (INTRC + EXTCK) • AS2 INTRC • AS2 1 1
DI PCINT7 INPUT PCINT6 INPUT
PCINT5 INPUT
SCK INPUT
PCINT4 INPUT
SPI MSTR INPUT
AIO Oscillator Output Oscillator/Clock Input – –
Notes: 1. INTRC means that one of the internal RC oscillators are selected (by the CKSEL fuses),
EXTCK means that external clock is selected (by the CKSEL fuses).
Table 18-5. Overriding Signals for Alternate Functions in PB3...PB0
Signal
Name
PB3/MOSI/TXD1/OC2A/PCINT3 PB2/SS/OC1B/PCINT2 PB1/OC1A/PCINT1 PB0/ICP1/CLKO/
PCINT0
PUOE SPE • MSTR + TXEN1 SPE • MSTR 0 0
PUOV PORTB3 • PUD PORTB2 • PUD 0 0
DDOE SPE • MSTR + TXEN1 SPE • MSTR 0 0
DDOV 0 0 0 0
PVOE SPE • MSTR + OC2A ENABLE OC1B ENABLE OC1A ENABLE 0
PVOV SPI MSTR OUTPUT + OC2A +
TXD1
OC1B OC1A 0
DIEOE PCINT3 • PCIE0 PCINT2 • PCIE0 PCINT1 • PCIE0 PCINT0 • PCIE0
DIEOV 1 1 1 1
DI
PCINT3 INPUT
SPI SLAVE INPUT
PCINT2 INPUT
SPI SS
PCINT1 INPUT
PCINT0 INPUT
ICP1 INPUT
AIO – – – –
18.3.2 Alternate Functions of Port C
The Port C pins with alternate functions are shown in the table below:
ATmega48PA/88PA/168PA
I/O-Ports
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40002011A-page 118