In recent years, with the computer penetration in the social field and the development of large-scale integrated circuits, MCU application is steadily deepening, as it has strong function, small size, low power dissipation, low prices, reliable, easy to use features, it is particularly suited to and control of the system, increasingly widely used in automatic control, intelligent instruments, gauges, data acquisition, military products and household appliances, and other areas. MCU is often microcontroller as a core component to use, In light of specific hardware architecture, and application-specific software features object combine to make perfect.
The purpose of this passage is to introduce the design of calculator which based on MCU AT89C51. The design connects 4×4 keyboard externally and displays the output data through LCD module. Also, the hardware structure design and software design program are given in the passage. Furthermore, the approach of testing the hardware, software and functional of the system have been referred to. In addition, this passage also introduced the interactive visual simulation of the system through the Proteus.
