GTCO CR 1212 - Users Guide - Manual (Page 31)

CR 1212 31
Transmission Control
The Stop Transmission and Resume Transmission commands act as software gates,
controlling data transmission from the CR 1212 to the host. These commands control the
data flow, regardless of the report collection mode (stream, Point, etc.).
Stop Transmission and Resume Transmission are equivalents of the transmission protocols
XOFF and XON.
Stop Transmission places the graphics tablet on standby. It is useful for systems that do
not constantly use the graphics tablet. End the standby state by sending the Resume
Transmission command.
NOTE: The Reset command does not cancel the Stop Transmission command.
While the tablet is on standby, it does not buffer reports for subsequent transmission.
However, if you issue Stop Transmission while data is being transmitted, no data is lost.
The CR 1212 severs the data transmission at the end of the report. When you issue the
Resume Transmission command, the tablet continues operation.
While the CR 1212 is on standby, it accepts and executes commands from the host. During
this state, however:
 Tablet does not execute the Echo command.
 Recommended to limit the number of status commands to one. Status commands
are commands that issue a reply to the host, e.g. Send Configuration. The tablet
issues the reply after it receives XON.
Section D: Reserved Commands
NOTE: Do not use the ASCII commands z, l, n or p or their equivalents. They’re reserved for
factory use. If a reserved command is issued by mistake, clear it by repowering the tablet
or by assigning the Reset command.