APPLICATION NOTE 187

1-Wire Search Algorithm


Abstract: Maxim's 1-Wire® devices each have a 64-bit unique registration number in read-only memory (ROM) that is used to address them individually by a 1-Wire master in a 1-Wire network. If the ROM numbers of the slave devices on the 1-Wire network are not known, then using a search algorithm can discover them. This document explains the search algorithm in detail and provides an example implementation for rapid integration. This algorithm is valid for all current and future devices that feature a 1-Wire interface.