Abstract
With the infiltration in the social field of the computer in recent years, the application of the one-chip computer is moving towards deepening constantly, drive tradition is it measure crescent benefit to upgrade day to control at the same time. In measuring in real time and automatically controlled one-chip computer application system, the one-chip computer often uses as a key part, only one-chip computer respect knowledge is not enough, should also follow the structure of the concrete hardware , and direct against and use the software of target's characteristic to combine concretely, in order to do perfectly.
This system one chip computer is in expands at the base of MCS-51 one chip computer. Make it used more convenient in the test system. This design mainly expands I/O in the take 51 on chip computer, expands the timer fixed time scope, expands the keyboard to demonstrate the connection and writes the first floor procedure.
This text has introduced the research meaning of this system and development environment used in the introduction at first, developing the one-chip computer chip of MCS-51 series used. Have described the overall design process in chapter two, have confirmed chapter three of choice of device has described emphatically that designs the block diagram and various kinds of chip functions and characteristics used in circuit design of the systematic hardware, hardware, have analyzed the design course of the software especially in chapter four.
Keywords：Technology of the one-chip computer, 8255A, Liquid crystal display
