This reference design provides hardware architecture for a Park Assist System (PAS) using three highly integrated: system-on-chip (SoC) ultrasonic transducer drivers. These ultrasonic transducer drivers have an integrated signal conditioner with an advanced digital signal processor (DSP) core. Using these integrated features: object detection from 25cm to 2.5m is achieved. The distance data is sent over a one-wire interface (OWI) to a local electronics control unit (ECU) where the data can be aggregated and processed. The sensor initialization: object detection algorithm: and software described in this design guide provide a basic framework to help engineers working on PAS for automotive or collision avoidance.