TUTORIALS 214

Using a UART to Implement a 1-Wire Bus Master


Abstract:

This application note explains how to use a microprocessor's UART to implement a 1-Wire® bus master. It includes an explanation of the required electrical interface, UART configuration, and timing relationship between the UART and 1-Wire signals. Additionally, it references the UART 1-Wire Master software utility, which generates both standard and overdrive speed timings to aide in development. The flexibility offered in setting up the UART byte timing allows the straightforward implementation of 1-Wire time slots as well as the Reset and Presence Detect pulses.