Techwell,Inc. TW8816 Evaluation Board User’s Manual
a. Panel Power Selection (J7)
The LCD panel power supply voltage can be selected with jumper J7. Please do not install more
than one jumper at once as this would damage the power supply on the evaluation board.
Voltage Jumper Position
3.3V 5:6
5V 3:4
12V 1:2 (FB17 is not installed and 12V is not available by default)
b. Inverter power Selection (J8)
The Inverter power supply voltage can be selected with jumper J8. Please do not install more
than one jumper at once as this would damage the power supply on the evaluation board.
Voltage Jumper Position
5V 3:4
12V 1:2
c. Inverter Interface (J9)
The J9 headers are used to provide power to an inverter for the LCD back light.
Pin Description Pin Description
1 GND 4 Brightness
2 VCC ( set by J8) 5 NC
3 On/Off
d. CCFL Controller Interface (CN16)
CN16 is available for the “Embed backlight controller board” connection to use the built-in CCFL
controller. This reduces the need of an external inverter used with J9. Note that if the CCFL
controller is used, the charge pump CP0 may not be used; thus, Part A of “TW8806B A070VW01
Daughter Card” cannot be connected. Also, please make sure that the firmware support CCFL
and that the CCFL interface is properly configured before using it. Incorrect configuration may
cause damage to the backlight controller board.
Pin Description Pin Description
1 12V 4 SEN1
2 CCFLN 5 SEN2
3 CCFLP 6 Ground
e. LCD Panel Connections
Version 1.00 9/25/2007
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