Advantech PCM-9574, User Manual

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26 PCM-9574 User's Manual
2.18 VGA interface connections
The PCM-9574’s PCI SVGA interface can drive conventional CRT
displays and is capable of driving a wide range of flat panel displays,
including electroluminescent (EL), gas plasma, passive LCD and
active LCD displays. The board has two connectors to support these
displays, one for standard CRT VGA monitors and one for flat panel
displays.
2.18.1 CRT display connector (CN15)
CN15 is a 16-pin, dual-in-line header used for conventional CRT
displays. A simple one-to-one adapter can be used to match CN15 to a
standard 15-pin D-SUB connector commonly used for VGA.
Pin assignments for CRT display connector CN15 are detailed in
Appendix C.
2.18.2 Flat panel display connector (CN16)
CN16 is a 40-pin connector which can support a 24-bit TFT LCD. It is
Hirose’s product no. DF13A-40DP-1.25V.
The PCM-9574 provides a bias control signal on CN16 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
PCM-9574’s power is applied, the control signal is low until just after
the relevant flat panel signals are present.
2.18.3 Ext. flat panel display connector (CN17)
CN17 consists of a 20-pin header, which is Hirose’s product no.
DF13A-20DP-1.25V. The PCM-9574 supports a 36-bit LCD panel
with connections to both CN16 and CN17. For details of pin
assignments, refer to Appendix C.