In the display control processing application that requires real-time input of a large number of Chinese characters, it is difficult to implement the design method of display control using traditional single-chip microcomputers. The use of LCD modules with Chinese character libraries makes it possible to input and display a large number of Chinese character information for small-capacity ROM single-chip microcomputers. A secondary index pinyin input retrieval method for Chinese character library encoding is proposed, and the interface method and Chinese character display and control principle of the LCD display module with Chinese character library using ST7920 as the controller are introduced. The serial interface of the general computer keyboard in the single-chip microcomputer is given. The use of this technology can greatly enhance the Chinese character input function of the single-chip microcomputer. It provides a Chinese character input solution for large-scale Chinese character information processing of small-capacity ROM single-chip microcomputers. Abstract: It is difficult to realize Chinese characters input method based on the embedded system by using the traditional design method of display control. It is possible to input and display Chinese characters based on the embedded system with the ROM of small content by using the LCD module with Chinese characters.Chinese characters input method of the quadric index recall in allusion to Chinese characters code is brought forward.The interface and the principle of Chinese characters display control based on the LCD module controlled with the ST7920 is introduced too.The serial interface of the computer keyboard in common use and the embedded system is given at the same time. It can enhance the embedded system function of Chinese characters input by using this technology, and provide a kind of Chinese characters input scheme for the embedded system with small capacity ROM.
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