User manual

27 Chapter 4
4.2.3 Synchronized Output Prompt Register
During normal operation, the card will accept digital values one at a time
from the host PC, convert these values to analog values, and
immediately output these analog values from the channels directed by the
host PC.
However, the cards have the capability to store each analog value in its
proper channel buffer as it is generated, then simultaneously output one
analog value from each of its four channels on receipt of a synchronizing
character. Any character can act as a synchronizing character, but it must
be written to the BASE + 9 register to prompt synchronized output.
4.2.4 Synchronized Output Control Bitt
The register BASE + 15 stores the synchronized output control bit. When
the SC0 bit is set to 1, the synchronized data output function is enabled
and analog values will not be output until a character is written to the
BASE + 9 register. When the SC0 bit is set to 0, the synchronized data
output function is disabled. Analog data output occurs as soon as an out-
put channel receives an element of output data.
Table 4.5: Synchronized Output Control Bit
Base
Address
+ decimal
Data Function Descrip-
tion
R/W
76543210
+15 SC0 Synchronized
output control bit
R/W