Design of 8-Bit Serial Real-Time Decoder Based on Complex Programmable Logic Device

This paper is aimed at the practical design method of 8-bit serial real-time decoder based on complex programmable logic device (CPLD). The design method is simple and novel. The decoder decodes the serial instruction-code from the land control center to the test system in the water adopting the serial peripheral interface agreement, in order to control various functions modules among the test system in the water, which include seven functions modules and each module control 8 kind of instructions real time. In the 8-bit serial code, the low four bits are the addresses, and the high four bits are instruction. Through the computer simulation and the actual system use, it achieves the design requirement of low error rate, stable operation, and high reliability.