An apparatus includes processing hardware, storage hardware, and serial communication hardware. The processing hardware receives selection of a serial communication protocol. The serial communication protocol is selected amongst multiple serial communication protocols to control operation of a power converter. Via the processing hardware or other suitable entity, the storage hardware is populated with a set of command decode functions (a.k.a., command descriptors) assigned to the selected serial communication protocol. During operation, the serial communication hardware receives commands over a serial communication interface and executes the received commands via the set of command decode functions in the storage hardware. Each of the multiple commands communicated over the serial communication interface is encoded in accordance with the selected serial communication protocol. The serial communication hardware uses the set of command decode functions to execute the received commands.