SH69P56 液晶显示的分压电阻什么的都是内嵌的.. 在硬件方面 液晶显示是不是只与 芯片工作电压有关了??
出现了 芯片工作电压 的跳动 造成 液晶 显示 亮度 跳动的现象 ! 可以用软件去设置 液晶亮度 的稳定性么 ??
就找到一个相关的寄存器如下,也没什么帮助好像!! $27 LVD O/S2 O/S1 O/S0 R/W Bit0: PORTD as LCD SEG1 - 4 control register Bit1: PORTE as LCD SEG5 - 8 control register Bit2: LCD SEG9 - 28 as output control register Bit3: LCD Voltage degrade control register
When LVD is set to 1 and the divider resistance is 270k, LCD voltage power will be degraded to about 90% of VDD. It is designed to reduce extra LCD contrast control output pins. Then the LCD can be fitted automatically for different voltage levels by the software.
求达人指教 .. |