MeiG Smart product technical information
SLM758
Hardware Design Guide
Page 44
Figure 4.16
：
Main LCD and sub LCD interface circuit
Both the primary and secondary LCDs require a backlight circuit. The backlight of the main
LCD is driven inside the module. It can directly use LCD_BL_LED_A, LCD_BL_LED_K1,
LCD_BL_LED_K2 to support up to 2 strings of 8 LEDs in total. The backlight driving circuit of
the secondary LCD can refer to Figure 4.17. Adjusting the brightness of the backlight can be
realized by PM8953_MPP2 of the module. The modulation method is PWM mode.
Figure 4.17
：
Backlight drive schematic
