9、 CPU 发出背光亮度调节信号EDP_BKLT_PWM 10、背光芯片 U7701 控制升压产生 24V 的背光电压PPHV_S0...
EDP_BKLT_PWM电压不出有什么原因呀？供电正常，开启正常，24v升压正常，最后测这个电压没有。测LID电压...
4948PWM_OUT03.3V3.3V3.3V PIU1049PIU1049PWM_INPWM_OUT0PIU1048PIU1048PWM_OUT0 NLPWM0OUT10GPIO(4) 39PWM_OUT1/GPIO(4) PWM_OUT1/GPIO[4]PIU1039PIU1039PWM_OUT1/GPIO(4) BLUP56 PIU1056PIU1056BLUP NLEN0BKLTPIR3502PIR3502PIR3602PIR3602PIR302PIR302 BLDN5546EN_BKLT PIU1055PIU1055BLDNENABKL/G...
2. eDP display can be attached to DDI ports on CPU providing that power and backlight signals (enable and PWM) will be implemented by external CPU-independent hardware (this way we lose OS possibilities like display on/off and adjust brightness without additional OS drivers, which I...
9、 CPU 发出背光亮度调节信号EDP_BKLT_PWM 10、背光芯片 U7701 控制升压产生 24V 的背光电压PPHV_S0SW_LCDBKLT 二、相关信号波形对比图 1、显示对比(接屏测试) CH1 EDP_PANEL_PWR CH2 DP_INT_HPD CH3 DP_INT_AUXCH_C_N CH4 DP_INT_ML_C_P<0> ...
3：21pin得到PCH发于的DPST_PWM然后芯片一边是转换LVDS一边也会输出BLON和DISP_ON去给屏一个工作条件 ...