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2.7
24-bit LCD Display Connector (CN5)
CN5 is a 40-pin dual-in-line header and is used to connect an LCD
display to the PCA-6751/6751V. The PCA-6751/6751V has bias
control which can be used to control the LCD signal voltage. Pin 7 of
CN5 is for LCD contrast adjustments, the LCD contrast can be
adjusted via the VR2 (located on the upper left corner of CN5).
The VGA interface is done completely with the softare utiliity
provided, please refer to Chapter 4 for details.
2.8
36-bit LCD Display Connector (CN6)
ThePCA-6751/6751V supports 36-bit LCD that must be connected to
both CN5 (40-pin) and CN6 (20-pin).
The pin assignments for both CN5 and CN6 can be found in
Appendix C.
2.9
LCD Inverter Connector (CN7)
The LCD inverter is connectoed to CN7 via a 5-pin connector to
provide +12 V power to the LCD display. Pin 4 of CN7 provides LCD
brightness control and can be ajusted via the VR1 (located on the
uppper right corner of CN7)
2.10 IR Connector (CN8)
This connector supports the optional wireless infrared transmitting
and receiving module. This module mounts on the system case. You
must configure the setting through BIOS setup.
2.11 External Speaker (CN9)
Connect external speakers to CN9. To activate the on-board buzzer,
set the connector so that Pins 4 and 5 are closed.
Chapter 2 Connecting Peripherals
19
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