How many uarts are present in atmega328p microcontroller?

 The ATmega328P microcontroller has one UART (Universal Asynchronous Receiver-Transmitter), also referred to as a USART (Universal Synchronous and Asynchronous Receiver-Transmitter).



Key Features of the ATmega328P UART:

  1. Asynchronous Communication:

    • Supports standard UART communication.
    • Used for serial communication protocols such as RS-232.

  2. Synchronous Communication:

    • Can operate in synchronous mode, where a clock signal is shared between the transmitter and receiver.

  3. Baud Rate:

    • Programmable baud rate.
    • Common baud rates (e.g., 9600, 115200) are supported.

  4. Applications:

    • Widely used in Arduino Uno for serial communication with computers or other devices.

    • Communicates through pins TXD (Transmit Data) and RXD (Receive Data).

    • TX (Transmit): Pin 3 (PD1)

    • RX (Receive): Pin 2 (PD0)

For applications requiring additional UARTs, you can use external multiplexers or software-based UART implementations (SoftSerial libraries in Arduino).

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