，该屏为COG12864液晶模块，内置ST7538控制器，接口为串口，该屏COG封装所以性价比比较高，电压为3.3V
HGO12864A介绍如下：
* Controller: NT7538 (COG)
* Display mode: FSTN / Positive / Transflective
* Operating voltage: 8.7V (LCD); 3.0V(VDD)
* Interface Input Data: 4-wire Serial Interface
* Driving Method: 1/64Duty, 1/9 Bias
* Viewing Directionrsquo;clock
* Operating temperature: -20°C~70°C
* Storage temperature: -30°C~80°C
* LCD Module sizeW) x 56.16(H) x 2.1Max(T)
* Viewing area: 43.00Min(w) x 29.16Min(H)
* Effective Display AreaW) x 26.86(H)
* Number of Dots: 128 x 64Dots
* Dot Size: 0.28(W) x 0.40(H)
* Dot Pitch: 0.30(W) x 0.42(H)
