Datasheet

89
8011Q–AVR–02/2013
ATmega164P/324P/644P
• INT0/RXD1/PCINT26 – Port D, Bit 2
INT0, External Interrupt source 0. The PD2 pin can serve as an external interrupt source to the
MCU.
RXD1, RXD0, Receive Data (Data input pin for the USART1). When the USART1 receiver is
enabled this pin is configured as an input regardless of the value of DDD2. When the USART
forces this pin to be an input, the pull-up can still be controlled by the PORTD2 bit.
PCINT26, Pin Change Interrupt Source 26: The PD2 pin can serve as an external interrupt
source.
• TXD0/PCINT25 – Port D, Bit 1
TXD0, Transmit Data (Data output pin for the USART0). When the USART0 Transmitter is
enabled, this pin is configured as an output regardless of the value of DDD1.
PCINT25, Pin Change Interrupt Source 25: The PD1 pin can serve as an external interrupt
source.
• RXD0/PCINT24 – Port D, Bit 0
RXD0, Receive Data (Data input pin for the USART0). When the USART0 receiver is enabled
this pin is configured as an input regardless of the value of DDD0. When the USART forces this
pin to be an input, the pull-up can still be controlled by the PORTD0 bit.
PCINT24, Pin Change Interrupt Source 24: The PD0 pin can serve as an external interrupt
source.
Table 11-13 on page 89 and Table 11-14 on page 90 relates the alternate functions of Port D to
the overriding signals shown in Figure 11-5 on page 78.
Table 11-13. Overriding Signals for Alternate Functions PD7:PD4
Signal Name
PD7/OC2A/
PCINT31
PD6/ICP1/
OC2B/
PCINT30
PD5/OC1A/
PCINT29
PD4/OC1B/XCK1/
PCINT28
PUOE0000
PUOV0000
DDOE0000
DDOV0000
PVOE OC2A ENABLE OC2B ENABLE OC1A ENABLE OC1B ENABLE
PVOV OCA2A OC2B OC1A OC1B
DIEOE PCINT31 • PCIE3 PCINT30 • PCIE3 PCINT29 • PCIE3 PCINT28 • PCIE3
DIEOV1111
DI PCINT31 INPUT
ICP1 INPUT
PCINT30 INPUT
PCINT29 INPUT PCINT28 INPUT
AIO––––