Datasheet

ATmega32A
 2018 Microchip Technology Inc. Data Sheet Complete DS40002072A-page 69
• OC1A – Port D, Bit 5
OC1A, Output Compare Match A output: The PD5 pin can serve as an external output for the Timer/Counter1 Out-
put 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.
• OC1B – Port D, Bit 4
OC1B, Output Compare Match B output: The PD4 pin can serve as an external output for the Timer/Counter1 Out-
put Compare B. The pin has to be configured as an output (DDD4 set (one)) to serve this function. The OC1B pin
is also the output pin for the PWM mode timer function.
• INT1 – Port D, Bit 3
INT1, External Interrupt Source 1: The PD3 pin can serve as an external interrupt source.
• INT0 – Port D, Bit 2
INT0, External Interrupt Source 0: The PD2 pin can serve as an external interrupt source.
• TXD – Port D, Bit 1
TXD, Transmit Data (Data output pin for the USART). When the USART Transmitter is enabled, this pin is config-
ured as an output regardless of the value of DDD1.
• RXD – Port D, Bit 0
RXD, Receive Data (Data input pin for the USART). When the USART 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.
Table 13-13 and Table 13-14 relate the alternate functions of Port D to the overriding signals shown in Figure 13-5
on page 61.
Table 13-13. Overriding Signals for Alternate Functions PD7:PD4
Signal Name PD7/OC2 PD6/ICP1 PD5/OC1A PD4/OC1B
PUOE 0 0 0 0
PUOV 0 0 0 0
DDOE 0 0 0 0
DDOV 0 0 0 0
PVOE OC2 ENABLE 0 OC1A ENABLE OC1B ENABLE
PVOV OC2 0 OC1A OC1B
DIEOE 0 0 0 0
DIEOV 0 0 0 0
DI – ICP1 INPUT – –
AIO – – – –