设计数字系统的过程一般可分为:系统功能定义、算法描述、硬件综合、性能估价和测试。算法描述是设计系统时较为困难的任务,硬件综合则与实现系统结构的器件有关。采用有限自动机ASM图(algorithmic state machine chart)的设计方法,是以一种类似于程序流程图的形式来描述系统的功能,借用顺序、判断、循环等结构,自上而下地进行设计,能明确地表达算法,使之易读和便于验证。用ASM图描述的算法,能在不同的级别上转换为相应的硬件结构,或微处理器系统中的软件程序。我们用此法设计 The process of designing digital systems can be generally divided into: system function definition, algorithm description, hardware synthesis, performance evaluation and testing. The description of the algorithm is a more difficult task when designing the system. The hardware synthesis is related to the device that implements the system structure. The design method of using algorithmic state machine chart based on finite automaton describes the function of the system in a form similar to the flow chart of the program and borrows the structure of order, judgment and circulation and designs from the top to the bottom, Explicitly articulate algorithms that make them easy to read and easy to verify. The algorithms described in the ASM diagrams can be translated at different levels into corresponding hardware structures or software programs in microprocessor systems. We use this method design