A single-wire bus apparatus that includes a bus slave circuit(s) is provided. The bus slave circuit(s) can receive a unicast, a multicast, and/or a broadcast command sequence over a single-wire bus. In embodiments disclosed herein, the bus slave circuit(s) can be configured to determine whether to respond to a received multicast or broadcast command sequence based on a predefined response policy. As such, the single-wire bus apparatus can be configured to mix and match a legacy slave circuit(s), which always responds to the received multicast or broadcast command sequence, with an enhanced slave circuit(s) that can decide whether to respond to the received multicast or broadcast command sequence based on the predefined response policy. As a result, it is possible to improve design and implementation flexibility, such as supporting more bus slave circuits per port.