Grass Valley Switcher Products - Manual (Page 94)

94 Switcher Products — Protocols Manual
Section 3 — Peripheral Bus II Protocol
Figure 7. Peripheral Bus System Block Diagram Example
E-MEM System Interaction (Learns, Recalls)
The switcher can be set to address a particular controlled device, such as a
character generator, during E-MEM learns and recalls. When a switcher
effect is learned into an E-MEM register, the switcher sends a command
over the peripheral bus to the controlled device telling it to learn its current
status into a memory register of its own. Later, when the same switcher
E-MEM register is recalled, the switcher will send a command over the
peripheral bus to instruct the controlled device to recall the effect that it
previously had stored in its memory.
The controlled device should store the learned information in nonvolatile
memory. The switcher does not keep track of what has been learned on the
controlled device, and does not ask for controlled device learn or recall
information.
For key framed effects in a controlled device (like a DPM), learning the
current status may not be sufficient. In this case, the controlled device
should associate its current effect number with the register number sent in
Serial
Port
XMIT
RCV
Controlling Device
(Switcher)
XMIT
RCV
XMIT
RCV
8063_02_05_r3
Peripherial 0
VTR
Peripheral Device Video Outputs to Switcher Video Inputs
Controlled Devices
NOTE: Controlling Device RCV and
Controlled Device XMIT are only used for
Read, Write, and Query Commands, which
are not used by Kalypso or Zodiak systems.
RS-485 Peripheral Bus
Peripherial 1
Char Gen
XMIT
RCV
XMIT
RCV
Peripherial 22
DPM
Peripherial 23
Still Store
Serial
Port
Serial
Port
Serial
Port
Serial
Port