UMX-TP-TX100R
Programmer’s Reference Manual
Section 2. About EDID memory
Page 11 / 43
2.
About EDID memory
EDID memory is non-volatile and consists of four blocks, each for different purpose.
These blocks are:
Factory preset EDIDs
User saved EDIDs
Dynamic EDID (EDID of last connected sink on the DDC output port)
Emulated EDIDs (EDID currently emulated on a specific input port)
EDIDs are numbered from 1 in each block, and they can be referred as the first letter of
the block name, and the number of the desired EDID. This way F02 refers to the second
factory preset EDID, and D01
refers to the display device’s EDID on output 1.
The memory structure is as follows:
F01 .. F10 ........................................................... Factory Preset EDIDs
U01 .. U08 ............................................. User programmable memories
D01 ...........................................
Last attached monitor’s EDID (output)
E01 .. E02 ....................................................... Emulated EDIDs (inputs)
All EDIDs (including factory preset; user programmable memories; EDID at other inputs;
and EDID at output) can be switched and emulated at any of the inputs.
Info:
The factory EDIDs (Fxx) are factory preprogrammed and cannot be modified. These are
the most commonly used resolutions.
Info:
UMXTP-TX100R can handle both 128 Byte EDID and 256 Byte extended EDID
structures.
Info:
The attached monitor’s EDID is stored automatically, until a new monitor is attached to
that particular output. In case of powering the unit off, the last attached monitor’s EDID
remains in non-volatile memory even is the monitor is unconnected.
Warning!
Emulated EDIDs can be switched with the rotary switches only.
2.1.
EDID types
Most of the factory preset EDIDs include only one resolution. This is to force the
connected source to give a signal with the needed resolution. However there are
Universal EDIDs as well which allow many resolutions.
The factory EDIDs are divided into groups regarding their type. Some EDIDs are
supporting DVI only, some support HDMI, and some are for analog VGA signals.
Analog EDIDs
can be used for VGA (RGBH) input port.
DVI EDIDs
does not support embedded audio.
HDMI EDIDs
support embedded audio. These EDIDs
– include Universal HDMI EDID -
indicate that any audio format is accepted (PCM, Dolby, DTS, etc.).
EDID
PCM audio
other audio
deep color
Universal_HDMI_DC
yes
yes
yes
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