Transmission Bandwidth of 3-Wire Synchronous Serial Port Based on LVDS

WANG Wen-hua; HE Bin; REN Jian-yue

doi:10.3788/YJYXS20112603.0344

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Transmission Bandwidth of 3-Wire Synchronous Serial Port Based on LVDS

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- Transmission Bandwidth of 3-Wire Synchronous Serial Port Based on LVDS
- Chinese Journal of Liquid Crystals and Displays Vol. 26, Issue 3, Pages: 344-349(2011)
- 作者机构：
  
  中国科学院长春光学精密机械与物理研究所,吉林长春,中国,130033
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20112603.0344
  CLC： TN791
- Received：05 December 2010，
  
  Revised：11 January 2011，
  
  Published Online：20 June 2011，
  
  Published：20 June 2011
- 稿件说明：
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王文华, 何斌, 任建岳. LVDS三线同步串口的传输速率[J]. 液晶与显示, 2011,26(3): 344-349

WANG Wen-hua, HE Bin, REN Jian-yue. Transmission Bandwidth of 3-Wire Synchronous Serial Port Based on LVDS[J]. , 2011,26(3): 344-349
王文华, 何斌, 任建岳. LVDS三线同步串口的传输速率[J]. 液晶与显示, 2011,26(3): 344-349 DOI： 10.3788/YJYXS20112603.0344.

WANG Wen-hua, HE Bin, REN Jian-yue. Transmission Bandwidth of 3-Wire Synchronous Serial Port Based on LVDS[J]. , 2011,26(3): 344-349 DOI： 10.3788/YJYXS20112603.0344.

摘要

搭建了一个合理的试验平台

利用FPGA产生10 bit数字自校图形

经过LVDS同步串口传输

在数据接收端处理串转并数据送入图像采集卡

通过实时观察接收图形是否正常来判断该传输速率下的可靠性。分别研究了基于FPGA片内低压差分模块和专业差分转换芯片的两种应用方案。通过大量试验得出结论:两种方案的最高传输速率

前者约能达到152 Mbit/s

后者约为125.2 Mbit/s。考虑到工程实际中可能面临的各种复杂应用环境

推荐适当降额应用。

Abstract

This paper tries to exam the transmission bandwidth by establishing a scientific test-platform. The paper provides a test pattern formed by 10 bit raw image data which is generated by FPGA as transmitter. The receiver performs data conversion serial-to-parallel and then sends image data as well as clock and enable signals to the image grabber. The transmission reliability is estimated by checking the real-time received test pattern through the 3-wire LVDS serial port. From abundant experiments

the paper gets two results: when LVDS is implemented by imbedding modules in FPGA

transmission bandwidth is approx 152 Mbit/s; when LVDS is implemented by special LVDS devices

transmission bandwidth is approx 125.2 Mbit/s. In practical application cases

bandwidth derating is advised.

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references

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