Switching module and high voltage tolerant I/O circuit

The invention relates to a switching mode and high voltage I/O circuit. Special an I/O circuit between a low voltage circuit and a high voltage circuit includes a switching device, a native device anda gate control logic circuit. The switching device provides an output signal to the high voltage circuit in response to a data input signal received from the low voltage circuit. The native device passes the data input signal to control an on or off state of the switching device. The gate control logic circuit operates in an output disabled mode and an output enabled mode. In the output disabledmode, the gate control logic circuit disables the native device for preventing a leakage current passing therethrough. In the output enabled mode, the gate control logic circuit enables the native device to pass the data input signal through without a substantial voltage drop, thereby enhancing a switching speed of the switching device.