Extron Electronics Matrix 200 - Manual (Page 106)

Extron • Matrix 200 • User’s Manual
Appendix B • Programming Guide
CMD27 (4Bh) — Set Baud Rate
Sets the baud rate for the host controller. Front panel baud rate cannot be set
using this command. When the port is changing its own baud rate, this becomes
active only after the response has been sent back.
Format: CMD27, Port#, Rate, Cks1, Cks2, EOT
Where: Port# = 80h host controller
81h n/a
82-FFh reserved
Bits 3-0 of Rate byte encode the baud rate:
80h 300 baud
81h 600 baud
82h 1200 baud
83h 2400 baud
84h 4800 baud
85h 9600 baud
86h 19,200 baud
87h 38,400 baud
88-8Fh reserved
Bits 6-4 = 0 for No Parity
Bits 6-4 = 1-7
reserved
Response: CMD27, Erc, Cks1, Cks2, EOT
CMD28 (4Ch) — Download Baud Rate
The Host asks the Matrix 200 to send the baud rate of a specific port.
Format: CMD28, Port#, Cks1, Cks2, EOT
Response: CMD28, Erc, Rate, Cks1, Cks2, EOT
Where: Rate and Port# have the same format as in CMD27
CMD29 (4Dh) — Set Operating Mode
The Host tells the Matrix 200 to enter a specific operating mode.
Format: CMD29, Mode, Cks1, Cks2, EOT
Where: Mode = 80h enable vertical interval switching, set bit-3 of StsB1
81h disable vertical interval switching, clear bit-3 of StsB1
82h enter a slave mode, set bit-4 of StsB1
83h enter an independent mode, clear bit-4 of StsB1
84h-FFh reserved
Response: CMD29, Erc, Cks1, Cks2, EOT
_______ Vertical interval switching implies using the Genlock signal from the “Genlock
In” connector on the back of the Matrix.
If vertical interval switching is enabled and there is no Genlock signal, switching
takes place after 50 ms.
B-18
StsB1 is Status Byte #1,
described on page B-8, for
command CMD0.