基于LVDS传输可靠性优化设计

Optimized design based on LVDS transmission reliability

针对LVDS传输初始化建链过程中出现的首帧丢失和干扰导致的误建链问题,对链路传输机理及稳定性进行分析,并从硬件与软件两方面进行优化。软件上采取识别帧头和发送训练帧的方法,改善建链过程;硬件上选用性能更好的隔离芯片,优化差分端阻抗,减小干扰对数据传输的影响。经多次试验证明,优化后的链路可实现480 Mb/s速率下的可靠传输,该优化设计对提高LVDS链路传输稳定性和减少误码方面具有很好的参考价值。

Aiming at the problem of the first frame loss and the mis-establishment of the link caused by the interference during the initial link establishment of LVDS transmission,this paper analyzes the link transmission mechanism and stability,and optimizes it from both hardware and software aspects.The software adopts the method of identifying the frame header and sending the training frame to improve the link building process.The hardware chooses a better performance electriciacl isolation chip and optimizes the differential terminal impedance to reduce the impact of interference on data transmission.Many tests have proved that the optimized link can achieve reliable transmission at a rate of 480 Mb/s.This optimized design has a good reference value for improving the transmission stability of the LVDS link and reducing errors.