Method and equipment for quickly establishing SerDes link connection

Abstract

The invention provides a method and device for quickly establishing SerDes link connection, and the method comprises the steps: enabling a receiving end to enter an initial state and unload impedance when a transmitting end and a receiving end are powered on or a link is abnormal and reconnected; the sending end then enters an initial state and starts to send the training sequence; the receiving end receives the training sequence sent by the sending end, signal frequency discrimination and clock data recovery (CDR) are carried out, and clock recovery is completed; mounting an impedance after the receiving end finishes clock recovery; after detecting that the impedance of the receiving end is mounted, the transmitting end enters a normal state, and an input source is switched to transmit high-speed data; and the receiving end enters a normal state and starts to receive and analyze the high-speed data. Through the method, the efficiency of establishing the connection of the SerDes link is improved, and the reliability of establishing the connection is improved.

Description

technical field [0001] The present invention relates to the technical field of SerDes high-speed transmission, and in particular, to the technology of establishing a high-speed link connection. Background technique [0002] The rapid development of the automotive industry, especially new energy vehicles, has brought a large number of applications in the automotive field. SerDes transmission technology carries the role of the transmission link between sensors and central control, central control and in-vehicle audio and video terminals in the automotive field, such as reversing. Video, vehicle streaming media, ADAS, vehicle audio and video and other applications, so SerDes technology is more and more widely used in the vehicle field. Based on the characteristics of vehicle products requiring high reliability, real-time signals and fast response, it requires high efficiency for SerDes link establishment. , high reliability requirements. [0003] SerDes is the abbreviation of ...

AI Technical Summary

Problems solved by technology

[0007] The sending end TX needs to synchronize and lock the reverse link according to the reverse low-speed signal sent by the receiving end RX, and then perform a handshake between the sending end TX and the receiving end RX to complete the connection establishment, which will bring more time consumption. Extend connection establishment time

[0008] Furthermore, because the reverse low-speed signal is transmitted on the same cable as the forward high-speed signal, the link requirements are relatively high. If the link quality is not good, it may be necessary to exchange handshakes between the sending end TX and the receiving end RX to establish a connection, which prolongs the connection. The build time, reliability and stability are relatively low, the user experience is poor and the complexity of the design will increase

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