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Adaptive adjustment and optimization method of link quality

A link quality and self-adaptive technology, applied in the direction of response error generation, redundant code error detection, transmission system, etc., can solve problems such as product performance impact, achieve high degree of automation, reduce transmission bit error rate, improve The effect of transmission quality

Active Publication Date: 2016-09-07
LANGCHAO ELECTRONIC INFORMATION IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For each manufacturer, the DFE coefficient adaptive algorithm is confidential and will not be announced to the public. From the perspective of Serdes users, if the DFE ROM provided by the manufacturer is not ideal for improving the quality of Serdes links, it will affect the performance of the product. cause greater impact

Method used

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  • Adaptive adjustment and optimization method of link quality

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A link quality self-adaptive tuning method, for the link of high-speed serial interface Serdes, described method is by adding PRBS-31 pseudo-random code generation / verification to the de-emphasis equalization process of high-speed serial interface, and with error Bit rate and temperature changes are used as DFE end judgment marks to form a fixed process for high-speed Serdes link quality optimization.

Embodiment 2

[0029] like figure 1 As shown, on the basis of embodiment 1, the method described in this embodiment includes 7 links:

[0030] 1) De-emphasis parameter configuration at the sending end, according to the Tx EQ parameter value obtained after the PCB board-level high-speed signal simulation integrity simulation, write it into the corresponding de-emphasis (De-emphasis) configuration register of the Serdes configuration module through the SMBUS bus;

[0031] 2) Transmitter / receiver polarity configuration. After completing the EQ parameter configuration of the transmitter, configure the Tx / Rx polarity register of the Serdes according to the PN inversion of the high-speed serial interface in the PCB board-level design;

[0032] 3) BIST mode and verification mode configuration, after completing the sending / receiving end polarity configuration, configure the Serdes sending end Tx to BIST mode, and start sending PRBS-31 pseudo-random sequence code; the receiving end Rx turns on data c...

Embodiment 3

[0038] On the basis of Embodiment 2, this embodiment solidifies the process into an automatic script, which is automatically executed every time the system is powered on.

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Abstract

The invention discloses an adaptive adjustment and optimization method of link quality. For the link of a high-speed serial interface SerDes (Serialzer-Deserializer), the method adds PRBS (Pseudo Random Binary Sequence)-31 pseudo-random code generation / checkout into a de-emphasis balancing process of the high-speed serial interface, an error rate and temperature change are taken as the end judgment signs of DFE (Decision Feedback Equalization), and a fixed flow of high-speed SerDes link quality adjustment and optimization is formed. The method can effectively improve the transmission quality of the SerDes link, obviously lowers the transmission error rate so as to improve the transmission performance of a chip bus, is high in automation degree, and has the characteristics of high link adjustment and optimization speed, good effect and the like.

Description

technical field [0001] The invention relates to the field of integrated circuit chip design and the field of digital communication technology, in particular to a link quality adaptive tuning method, a link quality adaptive tuning method for high-speed serial interface Serdes. Background technique [0002] With the rapid growth of the amount of information carried by modern communications, users' demand for high bandwidth is becoming more and more urgent, and the traditional parallel bus technology can no longer meet the requirements of gigabit data transmission rates. The application of high-speed serial interface technology gradually replaces parallel communication technology and becomes the mainstream solution in the field of high-speed communication. SerDes (Serializer-Deserializer, serial-deserializer) is the main component of the physical layer of high-speed serial interface protocol, and its performance is directly related to the quality of high-speed communication. ...

Claims

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Application Information

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IPC IPC(8): G06F11/10G06F13/42
CPCG06F11/1004G06F13/4282G06F2213/0034G06F11/10H04L1/00
Inventor 周恒钊童元满李仁刚刘金广
Owner LANGCHAO ELECTRONIC INFORMATION IND CO LTD
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