随着集成电路技术的迅速发展,以MSI和LSI工艺为基础的各种逻辑功能部件应用日益广泛,已成为目前数字逻辑电路采用的主要元件类型之一。因此,数字电路课程的重点已由SSI转向MSI、LSI和数字系统。同时,由于MSI和LSI的通用化、工程化和模块化的特点,对数字电路教学的直观性和实践性环节都提出了更高的要求。仅就MSI而言,一些典型的组合逻辑和时序逻辑功能组件的性能,已很难在课堂上用叙述或图表等一般方法来表达清楚,专门制作的图表虽然可以详尽地表示复杂的连线和真值表或功能表,但显得繁琐枯燥,可读 With the rapid development of integrated circuit technology, various logic functional components based on MSI and LSI technology have been widely used and have become one of the main component types adopted by digital logic circuits at present. As a result, the focus of the digital circuit course has shifted from SSI to MSI, LSI and digital systems. At the same time, due to the commonality, engineering and modularity of MSI and LSI, higher requirements are put forward for the visual and practical aspects of digital circuit teaching. For MSI only, the performance of some typical combinatorial logic and timing logic functional components has been difficult to express clearly in the classroom using general methods such as narration or graphing. Although a specially crafted graph can express complex connections in detail Truth meters or menus, but tedious and readable