Pin multiplexing circuit, working method of pin multiplexing circuit, fast charging chip and working method of fast charging chip

The invention provides a pin multiplexing circuit, a working method of the pin multiplexing circuit, a fast charging chip and a working method of the fast charging chip. The circuit comprises a main control circuit, a Type-C detection circuit, a PD communication circuit, an ID authentication circuit, a VOOC detection circuit, a multiplexing terminal, a first data terminal and a second data terminal, wherein the Type-C detection circuit, the PD communication circuit, the ID authentication circuit and the VOOC detection circuit are electrically connected with the main control circuit, the Type-Cdetection circuit, the PD communication circuit and the ID authentication circuit are electrically connected with the multiplexing terminal, the first data terminal and the second data terminal are electrically connected with the VOOC detection circuit, the Type-C detection circuit sends a Type-C access signal to the main control circuit, the VOOC detection circuit sends a VOOC access signal to the main control circuit,