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介绍了一种基于EPLD芯片ATV750的16线至4线优先编码键盘接口的设计方法,并给出了其设计的ABEL源程序以及与AT89C51单片机接口的汇编程序,该设计方法在MCU+CPLD/FPGA电路模式中得到广泛应用。
This paper introduces a design method of 16-wire to 4-wire priority code keyboard interface based on ATV750 of EPLD chip, and presents the ABEL source program and the assembler program with interface of AT89C51. The design method is based on MCU + CPLD / FPGA Circuit mode has been widely used.