基于CPLD的LXI星型集线器设计  

Design of LXI star hub based on CPLD

作　　者：詹文彬[1] 苏燕辰[1] 孟劲松[2] 

机构地区：[1]西南交通大学机械工程学院,四川成都610031 [2]西南交通大学牵引动力国家重点实验室,四川成都610031

出　　处：《中国测试》2009年第5期59-62,共4页China Measurement & Test

摘　　要：为了扩展LXI仪器的系统容量,根据LXI标准中硬件触发星形集线器的原理,设计了基于CPLD的星形集线器。系统以ALTERA公司的CPLD芯片MAX7064作为控制核心,使用TI公司的M-LVDS收发器芯片SN65MLVD080收发LXI仪器的触发信号,实现了在一个四端口LXI系统内部,4个通道中同名通道间的LXI总线触发信号同步传输。实验表明,该星形集线器成功的完成了信号的传输,并且时间延迟较低,具有较好的应用效果。For the purpose of expending LXI＇s system capability, based on the theory of the hardware triggering star hub in LXI standard, design this star hub which based on CPLD. The design use Ahera＇s CPLD chip MAX7064 as the control core, and use the half-duplex M-LVDS line transceivers SN65MLVD080 which produced by TI to receive and trance the LXI＇s trigger signal. The function of LXI Star Hub is accomplished, in a LXI system with 4 ports, the LXI Star Hub could receive a Trigger Bus signal on any one of the four channels under any port and simultaneously retransmitting that signal on the same channel of all other three ports. The results of experiments show that the star hub could accomplish the signal＇s transmission with low time delay, and has good apply effect.

关 键 词：LXI仪器 星形集线器 CPLD 硬件触发 M-LVDS芯片 

分 类 号：TP311.52[自动化与计算机技术—计算机软件与理论] TP336[自动化与计算机技术—计算机科学与技术]