DO_EN pin allows user to turn OFF all the channels regardless of the SW_STATE register status. If the DO_EN is kept low, all the output channels cannot be turned ON even if the SW_STATE register shows channels are enabled.

When the SW_STATE commands are sent during DO_EN low period, the register values will be stored in the register. Once the DO_EN goes high, then the output states will follow the register values stored in the SW_STATE.