Advantech PCA-6359 user manual LCD Inverter Connector CN23, Controlling the soft power switch

Warnings: 1. Make sure that you unplug your power supply when adding or removing expansion cards or other system components. Failure to do so may cause severe damage to both your CPU card and expan- sion cards.

2.ATX power supplies may power on if certain motherboard components or connections are touched by metallic objects.

Important: Make sure that the ATX power supply can take at least a 720 mA load on the 5 V standby lead (5VSB). If not, you may have difficulty powering on your system and/or supporting the "Wake on LAN" function.

2.14.2 Controlling the soft power switch

Users can also identify the current power mode through the system's power LED (see Section 2.13.1).

2.15 LCD Inverter Connector (CN23)

CN23 consists of a 44-pin dual inline header.

The PCA-6359 Series provides a bias control signal that can be used to control the LCD bias voltage. It is recommended that the LCD bias voltage not be applied to the panel until the logic supply voltage (+5 V or +3.3 V) and panel video signals are stable. Under normal operation, the control signal (ENAVEE) is active high. When the PCA-6359 Series' power is applied, the control signal is low until just after the relevant flat panel signals are present.

Chapter 2 Connecting Peripherals 29