Detection circuit, detection method and chip

Abstract

The present application relates to a detection circuit, a detection method and a chip. The detection circuit includes: two transceiver circuits, the differential ports between the two transceiver circuits are connected to each other, the transceiver circuit includes a transmitter circuit, an echo cancellation circuit, a switch circuit and a receiver circuit, and the first output end of the transmitter circuit is connected to the echo cancellation circuit. The first input end of the circuit forms a first path, the second output end of the transmitting circuit, the switch circuit and the second input end of the echo cancellation circuit form a second path, wherein the receiving circuit is used to conduct the second path in the switch circuit When , determine whether the differential port is abnormal according to the output signal of the echo cancellation circuit. The detection circuit can avoid adding additional analog circuits to realize differential port status detection, and can determine whether the differential port is abnormal only by controlling the working status of the echo cancellation circuit by the switch circuit, so that on the basis of ensuring the differential port status detection function, it can Reduce the size of the detection circuit.

Description

technical field [0001] The present application relates to the field of network technology, and in particular, to a detection circuit, a detection method and a chip. Background technique [0002] As there are more and more electronic devices in the car, the challenge to bandwidth is also getting higher and higher. The use of in-vehicle Ethernet technology can satisfy the calculation and communication of different devices in the car. In order to keep the calculation and communication process smooth, it is necessary to detect the interface status of the in-vehicle Ethernet in real time, so as to solve the problem of interface connection failure in time according to the detection results, so that the interface of the in-vehicle Ethernet can maintain a normal connection state. [0003] In the traditional technology, an analog detection circuit is added to the Ethernet physical layer interface circuit to perform real-time detection on the interface state of the vehicle Ethernet. ...

AI Technical Summary

Problems solved by technology

However, using the traditional way to detect the interface state will increase the scale of the circuit

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