CRC编码运算中移位寄存器的设计

循环冗余校验（CRC）是一种编码简单且有效的串行数据校验方法，在通信及计算机数据存储中得到了广泛应用。在串行CRC编码实现中，移位寄存器主要完成将并行输人数据转换成串行输出数据的功能，是整个设计的重要组成部分。以发送8位信息码为例，在Altera公司的开发工具QuartusⅡ软件下，分别选用数字集成电路芯片74LS166和VHDL编程两种方法，成功地完成了移位寄存器的设计，可以满足不同的应用需求。仿真结果准确、可靠，符合设计需要，有一定的实用意义。

Design of Shift Register in CRC Code Operation

Cyclic redundancy check(CRC) is widely used in communication and data storage because of high dependability and easy of realization.The shift register's function is completion of parallel data input into serial data output.The design of shift register is an important part in the realization of CRC code.Takes the transmission of 8 bit data as an example,selects two methods of integrated circuit chip 74LS166 and VHDL,in Altera Corporation's Quartus II software.It has completed the design of shift register successfully and met the needs of different applications.The simulation result is accurate and reliable,conforms to the design need,has certain practical significance.