Input and output interface circuit

The invention provides an input and output interface circuit, which comprises a logic control circuit, a level conversion circuit, a pre-stage driving circuit and a driving tube circuit, and is characterized in that the logic control circuit is used for receiving a low-voltage data signal and a driving gear control signal; the level conversion circuit is used for converting a driving gear control signal into a high-voltage control signal, the pre-stage driving circuit is used for controlling the switching of the plurality of switching tubes according to the high-voltage control signal and outputting a plurality of driving signals for controlling the driving tube circuit, and the plurality of driving signals are connected for simultaneous output. The driving tube circuit determines a driving gear according to the plurality of driving signals, drives a corresponding driving tube according to the driving gear, and converts the low-voltage data signal into an output signal according to a switch of the driving tub