INTERFACE INSERTION ANOMALY DETECTION CIRCUIT AND METHOD

摘要

Provided are an interface insertion anomaly detection circuit and method applicable to the field of mobile terminals. The interface insertion anomaly detection circuit comprises a power circuit (4), and further comprises: a first USB interface (1), comprising a first power line and a first signal line, a power end of the first power line being connected to the power circuit (4); a second USB interface (2), comprising a second power line and a second signal line, the second power line and the second signal line being short-circuit connected, wherein the second USB interface (2) connects the second signal and the first signal line through insertion to the first USB interface (1); and a controller (3), a first voltage collection end and a second voltage collection end thereof being respectively connected to the power end of the first power line and a signal end of the first signal line. The controller (3) can determine, according to a calculated voltage difference, whether the first power line and the second power line are well connected by insertion, and then determine whether to start or resume charging a cell of a mobile terminal through the first USB interface (1) and the second USB interface (2).