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5.3. About EDID memory
EDID memory is non-volatile and consists of four blocks, each for different purpose.
These blocks are:
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 D15 refers to the display device's EDID on output 15.
Dynamic and emulated EDID blocks' size adapts to the frame size. The memory structure
is as follows:
All EDIDs (including factory preset; user programmable memories; EDID at other inputs;
and EDID at outputs) 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: MX-CPU2 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.
5.3.1. 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. Also
there are some EDIDs for Dual Link DVI resolutions.
DVI EDIDs does not support audio. The Universal DVI EDID indicates support for many
PC (VESA) resolutions.
HDMI EDIDs support embedded audio. These EDIDs have PCM stereo audio format
enabled. To allow other audio formats like Dolby and DTS, special EDIDs have to be
used. There are three Universal HDMI EDIDs which include the same resolutions but
support different capabilities.
Analog EDIDs can be used for input ports which have a VGA (RGBHV) source.
Dual Link DVI EDIDs does not support audio. Use only for Dual Link ports.
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Factory preset EDIDs
User saved EDIDs
Dynamic EDIDs (EDID of last connected sink on a specific output port)
Emulated EDIDs (EDID currently emulated on a specific input port)
F01..F99 ............................................................. Factory Preset EDIDs
U01..U50 ............................................... User programmable memories
D01..Dxx ................................. Last attached monitor's EDIDs (outputs)
E01..Exx ......................................................... Emulated EDIDs (inputs)
EDID
Universal_HDMI_PCM
Universal_HDMI_ALL
Universal_HDMI_DC
PCM audio
other audio
yes
no
yes
yes
yes
yes
deep color
no
no
yes
Section 5. Operation
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