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Digital I/O Features
2-19
Figure 2-6. Timing Relationship between Data from DO0 to DO7 and
Latch Strobe DOSTB
Using Digital Control Signal TGOUT
When using the onboard pacer clock only, you can use the trigger/gate
output (TGOUT) signal to synchronize other DAS-1800HC Series boards
or to trigger or gate user-specific events as follows:
●
When using digital control signal TGIN as a trigger, as shown in
Figure 2-7a, note that TGOUT does not retrigger and thus cannot be
used with about-trigger acquisitions. Note also, there is a delay of
about 200ns between the active edge of TGIN and the starting edge of
TGOUT.
●
When using digital control signal TGIN as a gate, as shown in Figure
2-7b, note that there is a delay of about 200ns between the active edge
of TGIN and the starting edge of TGOUT.
●
When using an internal trigger/gate, shown in Figure 2-7c, note that
the delay between the active edge of the internal trigger/gate and the
starting edge of TGOUT is less than 1µs.
300ns Strobe
Strobe
DOSTB
DO[7:0] Data
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