The VXI register-based device was a kind of module instrument, it was of good performance, easy to integrate and widely used at home and abroad.

VXI寄存器基器件是一种模块化仪器，其性能优良、易于集成在国内外得到了广泛的应用。

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Based on the properties of Enhanced Parallel Port (EPP), an interface of shift register output has been developed using Complex Programmable Logic Device (CPLD).

基于EPP协议的特点，应用复杂可编程逻辑器件(CPLD)开发了移位寄存器输出接口。

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