About Peripheral Ii Protocol; Peripheral Ii Protocol - Sony DVS-7300 User Manual

About PERIPHERAL II Protocol

PERIPHERAL II Protocol

DVS-7000 Series Switchers use PERIPHERAL II protocol to interface with
peripherals. Peripheral transmission to the switcher is not required.
The PERIPHERAL II protocol accommodates up to 24 devices on the same
bus. The switcher selects devices on the bus by using an address from 0 to
23.
PERIPHERAL II can initiate (trigger) an operation once a recall has taken
place. The PERIPHERAL II protocol acts as a serial form of GPI contact
closure.
Unlike the SMPTE ES bus protocol, PERIPHERAL II does not use BRK/
address/STX as part of its command syntax. The command syntax uses 23
ASCII characters which may be displayed on a conventional computer
terminal.
There are six commands in the PERIPHERAL II command set: LEARN,
RECALL, TRIGGER, QUERY, READ, and WRITE. DVS-7000 Series
Switchers only use LEARN, RECALL, and TRIGGER commands, which are
described on the following pages.
Command and Character Set
PERIPHERAL II protocol uses the following commands and characters:
One-character command abbreviations:
L:Learn
R:Recall
T:Trigger
<cr>:End of Message (carriage return)
Data:
0-9
A-F
All other ASCII characters are reserved for future use.
A-43
Appendixes