论文部分内容阅读
为简化PCB布板,增强系统功能,提高系统的速度、抗干扰性、可靠性,提出一种用Altera公司CPLD芯片EPM7128S实现MCU外围接口电路的方法.在环境监测仪的MCU外围接口电路中,根据其功能结构与宏单元特点,利用VerilogHDL硬件描述语言和MAXplus-II设计工具软件,在单片CPLD上设计了MCU与A/D转换芯片、Flash Mem-ory、LCD及键盘4个模块的接口电路.对各个模块进行了编译、综合和仿真.实验表明,在一片CPLD芯片EPM7128S上,可实现多种接口功能,简化接口硬件连接,提高译码速度,编程方便灵活.
In order to simplify the PCB layout, enhance the system function, improve the speed, anti-interference and reliability of the system, a method of realizing the MCU peripheral interface circuit by the CPLD chip EPM7128S of Altera Company is proposed.In MCU peripheral interface circuit of the environmental monitor, According to its functional structure and macrocell characteristics, using VerilogHDL hardware description language and MAXplus-II design tool software, the interface of MCU and A / D converter chip, Flash Mem-ory, LCD and keyboard is designed on a single chip CPLD The circuit compiles, synthesizes and simulates each module.Experiments show that on a CPLD chip EPM7128S, it can realize a variety of interface functions, simplify the interface hardware connection, improve the decoding speed, convenient and flexible programming.