Specifications

158004.B00 F1
APPENDIX F: TFTIF FLAT PANEL INTERFACE BOARDS
F.1 INTRODUCTION
The TP400 supports TFT panels of 640 x 480, 800 x 600 and 1024 x 768 pixel
resolution. A range of TFT panels from different manufacturers have been used
successfully with the TP400.
The TFTIFxx boards are a family of small PCBs that mount onto some TFT LCD
displays. They accept LCD signals from the TP400 flat panel connector J8 via a
length of high-density 40-way ribbon cable. These signals are then re-arranged on
the PCB and routed to the correct pins on the LCD.
At present there are four boards in the family that can be used with the TP400, as
shown in Table F1. When this appendix has to refer to all members of the family it
uses the term "TFTIFxx". Slightly confusingly, one board is called TFTIF, without
additional numbers to further identify it. The TFTIF31, TFTIF41 and TFTIFS15 boards
are newer than the TFTIF, and provide some additional features.
BOARD DISPLAY
MODEL
DISPLAY
MANUFACT-
URER
DISPLAY
RESOLUTION
SUPPLY
VOLTAGE
CONNECTOR
ON DISPLAY
TFTIF LP121S1 LG Electronics 800 x 600 +3.3V DF9-41S-1V
TFTIF31 LQ10D42,
LQ64D341
Sharp 640 x 480 +5V
+5V
DF9-31S-1V
LQ12S41 Sharp 800 x 600 +3.3V DF9-41S-1V TFTIF41
LM151X2,
LM151X4
LG Electronics 1024 x 768 +3.3V DF9-41S-1V
TFTIFS15 HLD1506,
HLD1508,
HLD1510
Hosiden Philips 1024 x 768 +5V FX8-80S-SV
TABLE F1 - TFTIF BOARDS AND THEIR DISPLAYS
Although originally designed for 800 x 600 displays, the TFTIF41 is also able to drive
some 1024 x 768 displays.
The TFTIF31 and TFTIF41 boards are likely to support a number of other displays
from other manufacturers, as the 31-way and 41-way connectors on the Sharp
display are used by a number of other manufacturers. Different displays may have
different pin assignments, however, and users must carefully check the pin
assignments on their displays to see that they match the pin assignments on one of
the TFTIF boards.
The TFTIF, TFTIF31 and TFTIF41 boards have a solder link area to allow the
selection of the correct power supply voltage for the LCD (either +5V or +3.3V). The
TFTIF31 and TFTIF41 boards contain power transistors that can switch off the power
to the LCD when instructed to do so by the graphics controller logic. This allows the
display to be powered down, if required, when the TP400 is in standby or suspend
modes.