brief introduction: Introduction:UARTs stands for Universal Asynchronous Receiver/Transmitter. It is a device or module in an integrated circuit that converts data from a synchronous serial or parallel interface to an asynchronous serial interface for use in signaling standards like RS232. The synchronous bus is attached to a central processing units (CPUs) system, and the UARTs receives or transmits data to and from this local bus and buffers this inside the UARTs. The buffers contain the data that is either recei