A drive circuit includes: a connection module, including a first and a second interfaces for receiving a control signal; an adjustment module, including: a first switch, a control end thereof is coupled to the first interface, a first end is coupled to a supply voltage, and a second end is coupled to a first resistor; second switch, a control end thereof is coupled to the second interface, a first end is coupled to a second resistor, and a second end is grounded; and a third resistor, coupled to the first and the second switches; and a write protection module coupled to the second end of the second switch, and including a software written and a write protection states, where the first and the second switches are controlled to be open or closed by using the control signal, to control the working states of the write protection module.