Unicorn Computer ENDAT-3857 - APPENDIX C: CH7511 B Backlight Control

ENDAT-3857 USERS MANUAL
UNICORN COMPUTER CORP.
35
Appendix C: CH7511B Backlight Control
CN3:LCD Backlight Control Connector (Map: PHR-6)
Pin No. Signal
1 GND
2 LVDS_BKLT_CTRL
3 PWRDN
4 BLUP
5 BLDN
6 GND
Notice:
PWRDN for Backlight On/Off Control:
When receiving active low pulse (0V) from this pin3 (PWRDN).
Example:
Using button switch on Pin1_GND & Pin3_ PWRDN.
LVDS_BKLT_CTRL for backlight brightness dimming:
PWM duty cycle range: from 30~100%, the output frequency from PWM Out can
be up to 400 kHz and Voltage level is +3.3V
Example:
Using button switches on “Pin6_GND & Pin4_ BLUP” and “Pin6_GND & Pin5_
BLDN”.
The Pin2_ LVDS_BKLT_CTRL connect to LCD Panel Backlight Dimming Pin
(Sample: AUO G190EG02_V1)