RFID (Radio Frequency IDentification) chip capable of realizing active access, and implementation method thereof

The invention discloses an RFID (Radio Frequency IDentification) chip capable of realizing active access, and an implementation method thereof. The RFID chip comprises an RF module, a DSP (Digital Signal Processing) module, an interface capable of being converted into an active mode, a rectification module and a memory unit, wherein the RF module is used for modulating data output by the DSP module to radio frequency carrier wave or demodulating modulated information on a received radio frequency signal; the DSP module is used for finishing processing an RFID protocol and controlling the memory unit and the interface capable of being converted into the active mode; the interface capable of being converted into the active mode is a controllable interface circuit and is used for communicating with an external sensor according to the control of the DSP module; the rectification module is used for carrying out voltage-multiplying rectification on the received radio frequency signal to obtain direct current voltag