SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
The HDQ1W works with HDQ and 1-Wire protocols. The protocols use a single wire to establish communication between the master and the slave. Both protocols use a return-to-1 mechanism; that is, after any command is driven, the line is pulled to a high level. This mechanism requires an external pullup.