The invention provides a
chip interface circuit. The
chip interface circuit comprises a
signal transmission-reception module, a recognition module, a
voltage protection module, a surge protection module and a switch module, the
signal transmission-reception module is electrically connected with a
data transmission-reception pin of a
chip, the recognition module is electrically connected with a
data transmission pin of the chip, one terminal of the
voltage protection module is electrically connected with an output terminal of a power supply, the other terminal of the
voltage protection module is electrically connected with a voltage input pin of the chip, the surge protection module is electrically connected with the recognition module, and the switch module is electrically connected with the surge protection module. According to the chip interface circuit, through the design of the recognition module, the recognized capability of the
data transmission pin is enhanced, the generated pull-up level and the pull-down level enable a circuit structure of the chip interface circuit to be more stable, the protection performance of the chip interface circuit is enhanced, and through the design of the voltage protection module, the damage to the chip due to large fluctuation of the voltage sent by the power supply or over-
high input voltage is prevented so that the protection performanceof the chip interface circuit is enhanced.