Kontron JRexplus-LX - Manual (Page 11)

KTD-S0004-A Page 8 Graphics Interface
JRexplus LX Software Guide
3.3.2 DisplayID TM Restrictions
Depending on the graphic controller not all features can be used. The following table shows the most im-
portant restrictions.
Restrictions for JRexplus LX
Panels with dual or quad clock not supported (2 or 4 Pixel per Clock)
Panels with LDI 24bit color mapping not supported
Variable power sequencing not supported
DisplayID
TM is not a solution for every LCD. Many displays center the picture automatically using the DE-
signal. In general the picture is centered automatically in horizontal direction but some displays also cen-
ter the picture vertically using this signal. Only for displays that can be driven with a
fixed mode timing a
displacement of the picture is possible. For these information please check the datasheet. With the
JRexplus LX board the parameters for the typical detailled timing out of the datasheet might not be correct
for centering the picture. In general the exact positioning of the picture has to be obtained experimental.
3.3.3 LCD Panel Selection
The choice of an LCD display is basically defined by two parameters.
Parameter Value
Pixel per Clock (Channels) 1
Maximum Pixel Clock 87 MHz
Currently this leads to a maximum resolution of
1366 Pixel (e.g. SHARP LK315T3LA31)
With the AMD graphic driver it is not guaranteed that every resolution can be achieved. KONTRON does not
guarantee the correct function of the board for untypical resolution. In principal the use of DisplayID
TM
allows realizing every special display resolution. For this a valid DisplayID TM dataset must be written to the
onboard EEPROM. Additionally the BIOS Setup entry
Advanced Chipset Features/LCD Resolution
must be set to Auto.
Many displays with a resolution up to XGA (1024 x 768) have a digital (TTL) interface. KONTRON offers a
special adapter to connect these displays to the LVDS interface (KAB-ADAPT-LVDStoTTL with part number
61029).