Vga Display Output (S-Video Or Cvbs Option); Backlight; Touch Panel Controller - Eurotech Vector User Manual

VGA Display Output (S-Video or CVBS option)

To support a standard VGA monitor, the Vector includes an on-board SDVO/RGB display converter
that accepts the Serial Digital Video Output (SDVO) from the Intel SCH US15W, encodes the data,
and drives the analog RGB output. Signals from three 10-bit DACs internal to the display converter
are mapped onto eight-bit color channels for red, green, and blue data. Header J13, page
the analog RGB display output. For electrical specifications, see
In addition to the 8:8:8 RGB data, the display converter provides a Display Data Channel (DDC)
interface on connector J13 for monitor "plug and play".
Notes:
As a volume production option, the Vector can provide an S-Video or CVBS output
supporting Standard Definition Television (SDTV) displays. With this option, a SDTV/HDTV
encoder replaces the SDVO/RGB display converter providing either an S-Video or CVBS
output on header J13.

Backlight

Most LCDs include one or more cold-cathode fluorescent lamp (CCFL) tubes to backlight the display.
Backlight inverters drive the panel backlights. These circuits are typically external to the display and
generate the several hundred volts required to drive the CCFL tubes. Backlights can easily become
the greatest source of power consumption in a portable system. Applications can dim or turn off the
backlighting to reduce power consumption.
The Vector supplies software-controlled backlight power and two backlight control signals on header
J15, page 32. For electrical specifications, Backlight, page 39.
The following table describes the backlight signals.
Signal
V_BACKLIGHT
L_BKLTEN_B
L_BKLTCTL_FIL

Touch Panel Controller

An on-board touch panel controller drives 4-, 5-, and 8-wire resistive touch panels. Header J15,
page 32 includes the touch panel signals, while jumper JP3, page
default, the Vector supports for 4- or 8-wire touch panels. For electrical specifications, see
Panel Controller, page 38.
The following table describes the wiring for 4-, 5-, and 8-wire resistive touch panels on header J15.
J15 Pin
26
28
30
32
34
36
38
40
Notes:
The on-board touch panel controller and second serial port share a serial interface;
therefore, these functions are mutually exclusive. Selection of these functions is set at time
of production. In the default configuration, the touch panel controller is selected and the
second serial port is not available.
110124-7000A
J15 Description
2,4 5 V backlight power (VIN option)
10 Turns backlight power on or off
12 Controls the intensity of the backlight
Table 4. Backlight Control Signals
Name 4-Wire
SX-
SY-
SY+
R (X+) Right
B (Y-) Bottom
T (Y+) Top
L (X-) Left
SX+
Table 5. Touch Panel Wiring
Hardware Specification
VGA Display Output,
29 selects the number of wires. By
5-Wire 8-Wire
Wiper Left sense
Bottom sense
Top sense
Lower right Right
Lower left Bottom
Upper right Top
Upper left Left
Right sense
31 provides
page 38.
Touch
19