User manual

Matrix Switching System—User Manual
59
ACK Type B
ACK Byte + LB + Index1 + Value1 + Index2 + Value2 +…..+ CRC Byte
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
AB
ACC
0
0
Device ID (0 – 31)
LB
Length for the total data bytes (Index + Value)
IB n
Index
VB n
Value
…
…
CB
CRC
AB & CB: These are the same as the ACK Type A.
LB: LB value is equal to the total data bytes (Index + Value), not include the CRC byte.
The maximum LB value of the ACK Type B is twice the total number of output or
input.
IB: Often means that the input or output port number. (Port 1 = 1, Port 2 = 2… Port n = n)
VB: Response the status refers to the table.
Request
Description
Index
Value
0x07
Request Video Output Channel
Output
Input
0x08
Request Audio Output Channel
0x09
Request Video Input Plug Status
Input
Enable
1: Plug
0: Unplug
0x0A
Request Audio Input Plug Status
0x0B
Request Video Output Plug Status
Output
0x0C
Request Audio Output Plug Status
0x11
Request Audio Output Mute Status
Output
0: Unmute, 1: Mute
0x13
Request Audio Output Volume
Level Range
(0 – 100)
0x15
Request Audio Output Bass
0x17
Request Audio Output Treble
0x19
Request Audio Output Subwoofer
0x1D
Request Audio Output Delay Low
Delay1
0x1F
Request Audio Output Delay High
Delay2
0x21
Request Input EDID Type
Input
EDID Type
Please refer to “Table – Command Index List” and “Table – Command Value List”.