Aaeon PCM-7890 User Manual page 38

You can select the LCD connector CN10 (pin 5 and pin 6) driving
voltage by setting J11. The configurations are as follows:
5V 3.3V *
J11
1 2 3
1 2 3
*default
You can select the LCD control signal by setting J12. The follow-
ing charts show the available option.
SHF CLK * ASHF CLK
J12
1 2 3
1 2 3
*default
26 PCM-7890 User Manual