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2.3.6
LCD Backlight On/Off control Connector (Optional)
The ARK-3440 supports a D-sub 9-pin connector which provides BKLTEN signal as
well as +12 V, +5 V and Ground Pin signals that allow the user to connect these sig-
nals to an LCD inverter to implement the LCD On/Off control.
Provides BKLTEN signal that inverter module requires for inverter on/off control.
Provides +12 V, + 5 V to serve as the inverter power source. The additional VBR
signal pin may be connected to the LCD inverter to allow the user to achieve
brightness adjustment through customer's software utility.
Table 2.8: LCD Backlight Connector Pin Assignment
Pin
Signal name
1
+12 V
2
GND
3
BKLTEN
4
VBR
5
+5 V
Figure 2.15 LCD Backlight connector (optional)
15
Pin
Signal name
6
Reserved
7
Reserved
8
Reserved
9
Reserved
ARK-3440 User Manual
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