HDMI 8x8 Matrix Switcher User Guide
5
Table 1: HDMI pin functions
Number
Signal name
Number
Signal name
1
TMDS Data 2+
2
TMDS Data 2 Shield
19
Hot Plug Detect
3
TMDS Data 2-
18
+5V Power
4
TMDS Data 1+
17
Ground
5
TMDS Data 1 Shield
16
DDC Data
6
TMDS Data 1-
15
DDC Clock
7
TMDS Data 0+
14
No Connect
8
TMDS Data 0 Shield
13
CEC
9
TMDS Data 0-
12
TMDS Clock-
10
TMDS Clock+
11
TMDS Clock Shield
Connecting the RS232 communication port
You can use the front-mounted buttons to control the CM-MT8810-HD matrix
switch. However, you can also perform control functions via a control system
(Clare Controls, Crestron, or other system) using its RS232 communication port.
The RS232 communication port is a female 9-pin D connector (DB9). As shown
in the table below, only pins 2, 3, and 5 are used. The standard functions of Tx,
Rx, and Gnd apply.
Table 2: RS232 connection definitions
No.
Pin
Function
1
N/u
Unused
2
Tx
Transmit
3
Rx
Receive
4
N/u
Unused
5
Gnd
Ground
6
N/u
Unused
7
N/u
Unused
8
N/u
Unused
9
N/u
Unused
