What is the purpose of having either single-ended or differential communication?
The DSI standard allows for either single-ended or differential bus communication configurations. With a single-ended bus communication the entire 3-state voltage waveform is produced on a single wire with the other wire serving a voltage reference and power return. With the differential bus communication the master produces a portion of the DSI voltage waveform on each of two wires such that the voltage difference between the positive and negative Bus wires are as defined by the DSI standard. Typically the positive and negative wire produce of the waveform on each wire; however, the bus standard only requires that the voltage difference between the positive and negative bus wires conform to the standard. The slave device cannot determine if the bus is single ended or differential. Controlling only the voltage difference between the positive and negative wires allows varying levels of sophistication while sill satisfying the standard. As a result there is flexibility within the standar
