Graphic dot matrix LCD module with microcontroller interface design

Graphic dot matrix LCD module with microcontroller interface design
As a liquid crystal display device , with its unique advantages are widely used in instruments, meters, electronic equipment and other low-power products. Display portion of the previous measurement and control instruments were powered LED Tsingtek 8x2 lcd display  for parameter settings and the results show that it displays less information , in the form of a single , human-computer interaction is poor, the operator demanding. The liquid crystal 3.5 TFT display module with low power consumption , small size, light weight advantages over other display , slim and programmable drivers and other incomparable, not only can display numbers, characters , you can also display a variety of graphic , curves, and characters , and can scroll down the screen , animation, flash, text feature display functions ; human-machine interface more friendly, more flexible operation , convenient, making it increasingly becoming the preferred display smart instrumentation and test equipment. This paper introduces the ST7920 to drive WGM-12832 display lcd 16x2 module pin basis , structure, function , based on detailed and AT89S51 microcontroller hardware interface circuit and interface software programming methods.