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Error Messages
E01 — Invalid output channel number (too large)
E10 — Invalid command
E13 — Invalid value (too large)
command and Response Table for SIS commands
Command
Video Mute
Video mute single output
Video mute all outputs
Query Video mute status
Audio Mute
Audio mute single output
Audio mute all outputs
Query Audio mute status
Video Color Bit Depth
Set video bit depth for a
specific input
Set video bit depth for all
inputs
View video bit depth for all
inputs
Signal Status
Request all signal status
Request all HDCP status
ASCII Command
Response
(host to unit)
(unit to host)
X!
X@
*
B
Vmt
X@
B
Vmt
B
Vmt
X!
X#
*
Z
Amt
X#
Z
Amt
Z
Amt
E
X!
X$
}
V
*
BITD
BitdV
E
X$
}
V
BITD
BitdV
E
}
VBITD
BitdV
E
}
LS
Sig
E
}
HDCP
Hdcp
Additional Description
X!
X@]
*
Video mute output
1, 2, 3, or 4 (HDMI DA4)
1, 2, 3, 4, 5, or 6 (HDMI DA6)
X@
= 0 (video mute disabled)
or 1 (video mute)
or 2 (video and sync mute)
X@]
Video mute all outputs
X@
X@
X@]
video mute status of outputs 1 to 4
•
•...
(HDMI DA4) or 1 to 6 (HDMI DA6).
X!
X#]
*
Audio mute output
X#
= 0 (audio mute disabled)
or 1 (audio mute)
X#]
Audio mute all outputs
X#
X#
X#]
Audio mute status of outputs 1 to 4
•
•...
(HDMI DA4) or 1 to 6 (HDMI DA6).
X!
X$]
X$
*
= 0 (auto, based on sink EDID)
X$]
X$
X$
X$]
video bit depth of outputs 1 to 4
•
•...
(HDMI DA4) or 1 to 6 (HDMI DA6).
X#
X#
X#
X#]
*
•
•...
Signal status (
outputs 1 to 4 (HDMI DA4) or 1 to 6
(HDMI DA6)
Signal status of input * output 1 •
output 2 • output n
X#
= 0 (signal undetected)
or 1 (signal detected)
X#
X#
X#
X#] X#
•
...
= 0 (HDCP on) or 1 (HDCP off)
*
HDCP status of input * output 1 •
output 2 • output n
HDMI DA4 and HDMI DA6 • SIS Commands
X!
only
X!
only
1 (force 8‑bit)
2 (pass‑through, unmodified)
X#
) of the input and
17
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