One kind of cursor display with an LCD drive control chip design

LCD monitors because of its small size, light weight, low voltage, low power consumption, with a very broad market prospects, including small and medium-size LCD STN LCD in the field of a large market share, has its unique advantages. STN LCD big screen can be used in notebook computers, word processors, etc. color, small STN LCD screens commonly used in cellular phones, PHS (Personal Handy System), pagers, etc. STN TFT LCD Module controller chip requires a special driver more control properties, such as liquid crystal display device of the normal display, cursor blink and shift display. Depending on the size of the LCD driver and the number of the desired function, the drive control chip depending on the complexity, mainly in its internal RAM, ROM size, the complexity of the instruction decoding circuit, the internal timing and power circuits, External drives can be reflected in the number of rows and columns of the port, with the MPU interface functions.
This design of LCD drive control chip is a common character dot matrix Character LCD Modules controller IC. The size of the chip belongs to LSI, prepared with low-power CMOS technology. We designed the LCD drive control chip has the following main functions: ① the form of providing bus MPU interface; ② with complete logic control circuit and timing generator control various display functions. Character display format is 5 × 8 dot matrix (208 kinds), 5 × 11 dot matrix (32 kinds), there are three display: line 5 × 8 dot matrix, two lines of 5 × 8 dot matrix, line 5 × 11 dot matrix , with the cursor display function and display characters and cursor shift function; ③ management and control of RAM and ROM, MPU easy access, easy to store and provide the necessary display character; ④ to provide scanning LCD display timing signal COM and SEG display data transmission , the output drive signal 16COM × 40SEG, from the sheet by attaching drive display 80 characters; ⑤ provides a fully functional control instruction set, easy programming the MPU.