The HDQ bus is a master-slave bus system using a simple one-wire, asynchronous, bidirectional, serial interface with a bit-rate of about 5-Kbit/s. The bus line is driven by open collector devices and therefore requires an external pull-up resistor. The relatively slow bit rate is sufficient for reading out as well as setting registers in battery monitor ICs.
HDQ Bus Analysers
We have a range of protocol analysers which will help you monitor and decode HDQ Bus traffic.
