MSC CX-MB-EVA2 user manual Backlight Inverter Interface, Pinout Backlight

CX-MB-EVA2 User's Manual Hardware

4.6.2Backlight Inverter Interface

The supply voltage of the backlight can be adjusted with jumper JP0601. The according position is printed on the PCB.

Jumper J5 should be set according to the backlight inverter used.

If the inverter needs a low active start signal, jumper J5 has to be set to L (pin1 connected to pin2).

If the inverter needs a high active start signal, jumper J5 has to be set to H (pin2 connected to pin3).

Brightness of the backlight inverter is controlled via the LVDS-BKLT-CTRL signal.

The LVDS-BKLT-CTRL signal of the COM Express module is a PWM signal with current chipsets. This signal is integrated and then limited to the maximum allowable voltage of the backlight inverter via a voltage divider.

Control voltage: 0...3V

A value of 0V corresponds to maximum brightness.

Specification:

￿ References: X15

￿ Connector: Molex (53047-0510) 53261-0590

￿Pinout: Refer to Table 5

Pin		Signal name	Function
1		VCC	Power supply backlight
2		GND	Ground
3		BLON#	Backlight On
4		VCON	Brightness control
5		GND	Ground
Table 10	Pinout Backlight

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