A trigger overrun generates if an input trigger is received before the previous input trigger processes.
To determine if a trigger overrun has occurred, reference the trigger overrun attributes.
For additional information on the hardware trigger modes, see TSP commands (on page 11-8).
To have direct control of the line state, use the bypass trigger mode.
Falling edge trigger mode
The falling edge trigger mode generates low pulses and detects all falling edges. The figure titled
"Falling edge input trigger" shows the characteristics of the falling edge input trigger; the figure titled
"Falling edge output trigger" shows the falling edge output trigger.
Input characteristics:
• Detects all falling edges as input triggers.
Figure 85: Falling edge input trigger
Output characteristics:
• In addition to trigger events from other trigger objects, the digio.trigger[N].assert() and
tsplink.trigger[N].assert() commands generate a low pulse for the programmed pulse
duration.
• An action overrun occurs if the physical line state is low and a source event occurs.
• When the trigger is asserted, it generates a low pulse for the programmed pulse duration.
Figure 86: Falling edge output trigger
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