Datasheet

ATmega164A/PA/324A/PA/644A/PA/1284/P
 2018 Microchip Technology Inc. Data Sheet Complete DS40002070A-page 94
14.3.4 Alternate Functions of Port D
The Port D pins with alternate functions are shown in Table 14-12.
The alternate pin configuration is as follows:
• OC2A/PCINT31 – Port D, Bit 7
OC2A, Output Compare Match A output: The PD7 pin can serve as an external output for the Timer/Counter2
Output Compare A. The pin has to be configured as an output (DDD7 set (one)) to serve this function. The
OC2A pin is also the output pin for the PWM mode timer function.
PCINT31, Pin Change Interrupt Source 31:The PD7 pin can serve as an external interrupt source.
• ICP1/OC2B/PCINT30 – Port D, Bit 6
ICP1, Input Capture Pin 1: The PD6 pin can act as an input capture pin for Timer/Counter1.
OC2B, Output Compare Match B output: The PD6 pin can serve as an external output for the Timer/Counter2
Output Compare B. The pin has to be configured as an output (DDD6 set (one)) to serve this function. The
OC2B pin is also the output pin for the PWM mode timer function.
PCINT30, Pin Change Interrupt Source 30: The PD6 pin can serve as an external interrupt source.
• OC1A/PCINT29 – Port D, Bit 5
OC1A, Output Compare Match A output: The PD5 pin can serve as an external output for the Timer/Counter1
Output Compare A. The pin has to be configured as an output (DDD5 set (one)) to serve this function. The
OC1A pin is also the output pin for the PWM mode timer function.
PCINT29, Pin Change Interrupt Source 29: The PD5 pin can serve as an external interrupt source.
Table 14-12. Port D pins alternate functions
Port pin Alternate function
PD7
OC2A (Timer/Counter2 Output Compare Match A Output)
PCINT31 (Pin Change Interrupt 31)
PD6
ICP1 (Timer/Counter1 Input Capture Trigger)
OC2B (Timer/Counter2 Output Compare Match B Output)
PCINT30 (Pin Change Interrupt 30)
PD5
OC1A (Timer/Counter1 Output Compare Match A Output)
PCINT29 (Pin Change Interrupt 29)
PD4
OC1B (Timer/Counter1 Output Compare Match B Output)
XCK1 (USART1 External Clock Input/Output)
PCINT28 (Pin Change Interrupt 28)
PD3
INT1 (External Interrupt1 Input)
TXD1 (USART1 Transmit Pin)
PCINT27 (Pin Change Interrupt 27)
PD2
INT0 (External Interrupt0 Input)
RXD1 (USART1 Receive Pin)
PCINT26 (Pin Change Interrupt 26)
PD1
TXD0 (USART0 Transmit Pin)
PCINT25 (Pin Change Interrupt 25)
PD0
RXD0 (USART0 Receive Pin)
PCINT24 (Pin Change Interrupt 24)
T3 (Timer/Counter 3 External Counter Input)