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What is microcontroller UART?
A universal asynchronous receiver-transmitter (UART /ˈjuːɑːrt/) is a computer hardware device for asynchronous serial communication in which the data format and transmission speeds are configurable. One or more UART peripherals are commonly integrated in microcontroller chips.
Why is 115200 baud?
Other “standard” baud are 1200, 2400, 4800, 19200, 38400, 57600, and 115200. The higher a baud rate goes, the faster data is sent/received, but there are limits to how fast data can be transferred. You usually won’t see speeds exceeding 115200 – that’s fast for most microcontrollers.
What should baud rate be for UART on microcontroller?
Look in your microcontroller datasheet for tables of UART errors at different baud rate and crystal frequencies. Errors above 0.2% can create unreliable transmission results, so you need to select your baud rate and crystal appropriately.
How does USART work on a microcontroller?
When using the USART on a microcontroller the error rate is also affected by the crystal frequency of the system as this affects how accurately the USART can generate the correct baud rate. For example, when using a 9.216MHz crystal, this divides exactly by the baud rate figures, like 9,216,000 / 19200 = 480, a whole number.
How is UART different from other communication protocols?
UART has a different transfer protocol than other communication protocols such as SPI and I2C. It is a physical circuit fount in a microcontroller. It can also function as a stand-alone integrated circuit. One significant advantage of UART is that it only relies on two wires to transmit data.
What does UART stand for in hardware category?
UART Communication stands for Universal asynchronous receiver-transmitter. It is a dedicated hardware device that performs asynchronous serial communication. It provides features for the configuration of data format and transmission speeds at different baud rates.