The UART The UART: What it is and how it works Table of Contents 1 The UART: What it is and how it works 2 Configuring the sio driver 3 Configuring the cy driver 4 Configuring the si driver Copyright © 1996 Frank Durda IV , All Rights Reserved. 13 January 1996. The Universal Asynchronous Receiver/Transmitter (UART) controller is the key component of the serial communications subsystem of a computer. The UART takes bytes of data and transmits the individual bits in a sequential fashion. At the destination, a second UART re-assembles the bits into complete bytes. Serial transmission is commonly used with modems and for non-networked communication between computers, terminals and other devices. There are two primary forms of serial transmission: Synchronous and Asynchronous. Depe……