This is something that we see a lot across STM32 peripherals, not just for USARTs, but also for timers in particular. This listing from the STM32F051 datasheet shows that both of these peripherals are quite distinct, with a lot of advanced features only on the first peripheral, with the second being rather barebones in comparison.
![universal control remapper scpv bus universal control remapper scpv bus](https://ableton-production.imgix.net/manual/en/RackMacros.png)
While all support basic UART features, some add USART support, some have IrDA and Smartcard mode. That is, until you realize that they’re not all identical. Which USART peripheral to use does seem like a pretty easy choice especially when the lower-end STM32F0 MCUs have only two USARTs. In this article we’ll see what it takes to get started with basic UART communication on STM32 microcontrollers. While somewhat trickier to set up and use than a GPIO peripheral, the U(S)ART of ST’s STM32 families is fairly uncomplicated to use, and immediately provides one with an easy way to communicate in a bi-directional fashion with a device.
![universal control remapper scpv bus universal control remapper scpv bus](https://m.media-amazon.com/images/I/517YixysI0L._SS400_.jpg)
When working with MCUs, they’re also one of the most common ways to output debug information.
#UNIVERSAL CONTROL REMAPPER SCPV BUS SERIAL#
Usually found in the form of either a UART or USART, the former allows for pure asynchronous serial communication, whereas the latter adds flow control. One of the most basic and also most versatile communication interfaces on an MCU is the UART, or Universal Asynchronous Receiver/Transmitter.