Specifications

26 PCI-6771 User's Manual
2.27 RS-232/422/485 connection
(COM2-CN17: RS-232; CN16: RS-422/485)
COM2 is an RS-232/422/485 serial port. The specific port type is
determined by jumper settings (JP3), as detailed in Chapter 1.
The IRQ and address range for both ports are fixed. However, if
you wish to disable the port or change these parameters later, you
can do this in the system BIOS setup. The table below shows the
settings for the PCI-6771 board's ports:
Table 2-10: PCI-6771 serial port default settings
Port Address Interrupt Default
COM1 3F8, 3E8 IRQ4 3F8
COM2 2F8, 2E8 IRQ3 2F8
2.28 Flat panel Display Connector (CN18)
CN18 is a 40-pin connector which can support a 24-bit TFT LCD.
It is Hirose’s product no. DF13A-40DP-1.25V.
The PCI-6771 provides a bias control signal on CN18 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 PCI-6771’s power is applied, the control signal is low
until just after the relevant flat panel signals are present.