Ampro Corporation LITTLE BOARD P5X - Manual (Page 57)

Little Board/P5x Technical Manual
2–39
Flat Panel/CRT Video Controller
The Little Board/P5x provides an integrated high-performance super-VGA video controller. The
video controller supports both CRT and flat panel displays. The standard video controller supports
only 3.3V video panels. (You can order an adapter to convert the 3.3V signals to 5V for 5V panels.)
There are five connectors associated with the video display. These connectors are summarized in
Table 2– 29. Complete hardware details about each connector and the features they support are
provided in sections that follow.
Table 2– 29. Video Connector Summary
Name Connector Pins/Type Description
J3
50-pin Shrouded
.100 Header
Provides connections for a broad array of
standard flat panel displays. Intended for a
standard 50-wire ribbon cable.
Flat Panel
J25
16-pin Shrouded
.100 Header
Provides additional connections for flat-panel
video data.
LCD Bias
Supply
Option
J4
12-pin .100
Header
Ampro provides a small add-on board that can
supply the Vee voltage for the most common
LCD flat panel displays. The board mounts to
this connector. For details about the Vee
Supply Option, refer to its section, below.
CRT J5
10-pin Shrouded
.100 Header
Provides connections for a CRT display. To
connect to a standard CRT cable, use a short
“transition cable” to a DB-15 connector. The
pinout for a transition cable is provided below.
ZV Port J6
26-pin 2mm
Header
Provides connections for external video
overlay signals.
Connecting a Flat Panel (J3)
Signals for a wide range of flat-panel displays, both color and gray-scale, appear on connectors J3
and J25. Although flat panels of a similar type use similar sets of signals from the video controller,
they do not share a standardized interface connector pin configuration. Note, also, that the names
of panel control signals vary from manufacturer to manufacturer. Read the description of each
signal carefully to determine how each signal is to be used for the display you choose. Refer to the
panel manufacturer’s technical literature to determine how to wire a cable for the panel you choose
for your application.
In many applications, the power management functions control the LCD display, for example, in
portable equipment. Furthermore, power and signals must be sequenced in time when the system is
energized to prevent damage to the display. The Little Board/P5x video controller provides power
and signal conditioning to meet these requirements.