Abstract: This SCM application system is named “controller of flow injection”. The system is made up of four parts: one is data acquisition, others are main engine circuit, human-machine communication, output controller. Data acquisition is to invert analogy signal to digital signal, and then send it to the computer. Main engine circuit is to connect SCM with all kinds of extended chips correctly, then the memory and I/O extension are completed, all the connected components make the intelligence and ability part. Human-machine communication is to achieve the aim of communication between human and machine, the SCM can receive all kinds of orders and datas through the human-machine interface and can give the results of calculating and operating. In addition, we can know all the working conditions of SCM by the communication part. These parts are keyboard, indicator, printer etc. Output controller is to drive the controlled object. My task is to drive the printer to print characters and graphics with 8155 by SCM.
Key words: data acquisition main engine circuit human-machine communication
output controller
