5. Device Concept
MMX8x4-HT series – User's Manual
48
Applied firmware package: v1.2.2b5 | LDC software: v2.2.1
The block diagram of the Serial interface
*In MMX8x4-HT400MC and MMX8x4-HT420M models.
Disconnect
This mode is for control the third-party device from the Matrix. In this case, the Matrix does not receive
RS-232 messages but sends serial data from the CPU.
The concept
Powering on the HDTV via RS-232 message from the matrix.
Settings
The
Matrix
can send RS-232 commands over the local RS-232 ports (P1 or P2) to the
HDTV
. You can see the
details about serial message sending in the
Sending Pronto Hex Codes in Little-endian Format via IR Port
section.
Control mode
The incoming data from the given port is processed and interpreted by the CPU. The mode allows to control
the matrix directly. LW2 or LW3 protocol commands are accepted – depending on the current port setting.
Application example of control mode
The concept
The
System controller
sends commands to the
Matrix
, which set the video and audio properties. The
Matrix
executes the commands and transmits the video signal to the sink.
Settings
The
System controller
can send LW2 or LW3 commands to the local RS-232 port (
P1
or
P2
) of the
Matrix
. In
control mode, the commands are processed in the device. This function makes possible to set the crosspoint
or a volume level etc.
Command injection mode
In this mode, the matrix works as an RS-232–Ethernet bidirectional converter. The Ethernet packets are
converted to RS-232 data and vice versa. Unique TCP/IP port numbers are defined for the serial ports for
this purpose.
E.g. the default Command Injection port number of the local RS 232 port (P1) is 8001. If a command is
coming from the LAN interface which is address to the port no. 8001, it will be transmitted to the Tx pin of
the local RS-232 port. That also works in the opposite direction.
In MMX8x4-HT420M model, the method is the same on the serial interface of the TPS port. Sending message
from a remote TPS device via TPS port to the RS-232 port of the matrix is also possible, but connecting the
Ethernet link to the TPS port with patch cables is needed.
Application example of command injection mode
section.
