| SPI总线数据远距离传输实现 |
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| 引用本文： | 梁德坚,刘玉琼. SPI总线数据远距离传输实现[J]. 电子测试, 2009, 0(1): 72-75 |
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| 作者姓名： | 梁德坚 刘玉琼 |
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| 作者单位： | 柳州运输职业技术学院,柳州,545007 |
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| 摘 要： | SPI总线是一种应用广泛的短距离串行同步通信协议，针对SPI总线数据不能进行远距离传输的问题，本文介绍了采用RS422／RS485通信协议，利用MAX3045和MAX3093芯片构成RS422／RS485收发电路，将SPI总线数据由单端不平衡传输方式转换为双端平衡传输方式，利用5类双绞线作为传输介质，使得SPI总线数据可靠传输距离延长至1200m，扩展了SPI总线的应用范围。
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| 关 键 词： | SPI总线 远距离数据传输 RS422/RS485通信协议 |
Remote transmission of SPI bus data |
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| Liang Dejian,Liu Yuqiong. Remote transmission of SPI bus data[J]. Electronic Test, 2009, 0(1): 72-75 |
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| Authors: | Liang Dejian Liu Yuqiong |
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| Affiliation: | (Liuzhou Transport Vocational Technical College, Liuzhou 545007, China) |
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| Abstract: | The SPI bus is a kind of communication protocols that serial synchronous were found wide use in short distance. It is countered the question that the SPI bus data can＇t be remote （data） transmission. In this text, we introduce to use communication protocol of RS422/RS485. Use MAX3045 ＆ MAX3093 chips to constitute RS422/RS485 transceiver circuit. The transmission mode of the SPI bus data is changed from imbalance transmission mode to be balance transmission mode. Use Cat. 5 twisted-pair to be transmission medium; to make that the reliable distance of the SPI bus data can be extend through to 1200 meter. To expanded the applied range of the SPI bus. |
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| Keywords: | the SPI bus remote data transmission protocol of RS422/RS48 |
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