How does the UART protocol work?

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2023-10-19T17:28:10+00:00

How does the UART protocol work?

How does the UART protocol work? If you have ever wondered how electronic devices can communicate with each other? efficiently and fast, the answer is found in the UART protocol. This protocol, short for Universal Asynchronous Receiver/Transmitter, is essential in the field of electronics and programming. It works as a communication interface that allows data exchange between different devices, such as microcontrollers and peripherals. Through a simple pair of cables, signals are transmitted and received in the form of bits, which allows the transfer of information serially. In this article, we will clearly explore how this protocol works, so that you can better understand how communication between different electronic devices takes place.

Step by step -- How does the UART protocol work?

The UART protocol is widely used for serial communication. between devices electronics. It allows the transfer of binary data in a simple and efficient way. Next, we explain how this protocol works Step by Step:

  • Step 1: Beginning of communication. So that two devices communicate through the UART protocol, one of them must assume the role of master and the other as slave. The master initiates communication by sending a start signal known as a start bit.
  • Step 2: Data transfer. Once the start bit has been sent, the master begins sending the data bits one by one. Each bit is transmitted serially, that is, one after the other.
  • Step 3: Data bits. Each bit of data is sent in the order of least to most significant. For example, if we are transmitting the number 5, which in binary is 0101, the least significant bit (1) will be sent first, followed by the next bit (0), and so on until all 4 bits are complete.
  • Step 4: Parity (optional). In some cases, a parity bit can be added to verify the integrity of the transmitted data. This bit is calculated based on the number of ones in the data bits and is used to detect possible errors during transmission.
  • Step 5: Stop bit(s). Once the data bits have been transmitted, the master sends one or more stop bits to signal the end of the transmission. These bits usually have a logical value 1.
  • Step 6: End of communication. After sending the stop bits, the communication is considered complete and the devices return to their sleep state.

The UART protocol is widely used in devices such as microcontrollers, communication modules and other electronic components. Its simplicity and efficiency make it an attractive option for serial communication between devices. Now that you know how it works, you can use it! in your projects electronics!

FAQ

UART Protocol FAQ

1. What is UART protocol?

The UART (Universal Asynchronous Receiver/Transmitter) protocol is a serial communication standard used to transmit data between electronic devices.

2. What is UART communication?

UART communication involves sending and receiving data in the form of packets of bits over a transmission line, without a shared clock signal.

3. How is UART communication established between devices?

UART communication is established through a physical connection using two pins: one to send data (TX) and another to receive it (RX).

4. What is the transmission speed in UART?

The transmission speed, also known as baudrate, determines the number of bits that are sent or received per second. It is configurable and may vary depending on devices.

5. How to configure the baud rate in UART?

  1. Start serial port configuration.
  2. Specify the desired transmission speed.
  3. Apply the configuration to the serial port.

6. What type of protocol is UART?

UART is an asynchronous protocol, which means that it does not use a shared clock signal between communicating devices.

7. What is the difference between UART and RS232?

UART is a communication protocol, while RS232 is a physical interface that uses the UART protocol to transmit serial data.

8. What are the limitations of UART communication?

  1. UART communication only allows connection between two devices.
  2. The transmission takes place in One wayboth (full-duplex is not possible).
  3. There is a distance limitation due to signal loss through the cable.

9. What is the advantage of using UART?

The advantage of using UART is its simplicity and ubiquity, since it is present in a wide range of electronic devices.

10. Where is the UART protocol used?

The UART protocol is used in numerous applications, including serial communications between microcontrollers, sensors, wireless modules, and Internet of Things (IoT) devices, among others.

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