Specifications

8x8 and 16x16 VGA / HDTV Matrix Switch with Audio, RS232 & IP Control
27
Primary
RS-232 Control
IP or Secondary
RS-232 Control
Processor
Out 1
Out 2
Out 3
Out
1
6
UART
Out Buffer
In Buffer
3.2.13 Routing RS-232 Communication through the Matrix
3.2.13.1 Basics of Serial Communication with the Outputs
The Matrices with the Serial Output Option are capable of sending serial
commands to each of the outputs.
Figure 16 – RS-232 Communication Methodology
The block diagram above depicts the way a user can communicate serially with a
remote devices connected to the matrix’s outputs. Matrix units with JR output
option can send video and serial through the same RJ45 output connector. A
compatible receiver must be used at the remote end (such as UR-232 for transmit
only).
Referring to the above diagram, two control ports are shown on the left. The user
communicates with the matrix’s internal processor through either of these ports.
As seen on the right side of the block-diagram, the matrix must first establish
UART (RS-232 engine) connection to one of the matrix’s output ports. There is a
specific command for doing this which makes the connection and also clears both
the input and output buffers of the internal UART.
Once the UART is pointed to the desired output, then any data received from the
remote device (1~16), is stored in the “IN BUFFER”. There is a command to read
this buffer. Upon receiving this command the matrix will send the entire contents
of the input buffer to the user and erase the buffer.
To send commands out to the remote device (1~16), the user can issue a transmit
command followed by a string of characters (ASCII or Hex), these characters are
stored in the UART’s output buffer. The user’s string must end with a special
“Terminal Character” followed by a Carriage Return. At that point the UART will
empty the output buffer to the selected remote device at the specified baud rate
(Terminal Character and subsequent CR will not be sent).