![]() When the UART receiver is enabled this pin is configured as an output regardless of the value of DDRD0. Receive Data (Data input pin for the UART). When the UART transmitter is enabled, this pin is configured as an output regardless of the value of DDRD1. Transmit Data (Data output pin for the UART). See the interrupt description for further details, and how to enable the source. ![]() INT0, External Interrupt source 0: The PD2 pin can serve as an externalinterrupt source to the MCU. See the interrupt description for further details, and how to enable the source The OC1 pin is also the output pin for the PWM mode timer function.Įxternal Interrupt source 1: The PD3 pin can serve as an external interrupt source to the MCU. See the Timer/Counter1 description for further details, and how to enable the output. The PD5 pin has to be configured as an out-put (DDD5 set (one)) to serve this f unction. Output compare match output: The PD5 pin can serve as an externaloutput when the Timer/Counter1 com-pare matches. WR is the external data memory write control strobe. RD is the external data memory read control strobe.
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