1-Wire devices provide economical solutions for identification, memory, time keeping, measurement, and control with an additional benefit of being able to operate at long distances (>100 meters). Maxim’s innovative 1-Wire ® protocol allows power delivery and digital communication across a single conductor plus a ground reference. 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. Additionally, it references the UART 1-Wire Master software utility, which generates both standard and overdrive speed timings to aide in development. It includes an explanation of the required electrical interface, UART configuration, and timing relationship between the UART and 1-Wire signals. This application note explains how to use a microprocessor's UART to implement a 1-Wire ® bus master.
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