Chapter 7: Programmable I/O Signal Architecture | 49
Auto-Trigger: Used to output a hardware trigger signal or pulse with the duration.
Software Trigger: An active high-output signal (pulse) generated as a result of the trigger
protocol command.
Recording: An active high-output signal. When active, indicates the camera is recording
into a RAM partition.
Event In: If the input is sampled low at the end of an exposure, an ‘E’ (Event) bit in the
frame’s timestamp is set.
Memory Gate In: If the input is sampled low at the end of an exposure, the corresponding
frame is skipped from storage to RAM.
Pre-trigger: An active low-input (default high) signal. Keeping this signal low for enough
time (10—500 ms or until ‘Ready’ signal goes high) will make the camera start recording, if
it has an available RAM partition.
Aux Trigger: An input signal active on the rising edge (default high). This is an alternative
trigger input that can be processed through the programmable port pulse processors and
assigned to different ports.
THE CORE SIGNALS
Core signals are copies of externally generated signals, routed through the camera and
output to assigned ports. Core signals can be pulse-processed before being output.
The current list of signals is:
Core Event: Feedback output from the ‘Event In’ signal. The feedback is taken after any
pulse processor for the output.
Core Memory Gate: Feedback output from the ‘Memory Gate In’ signal. The feedback is
taken after any pulse processor for the output.
Core Frame Sync: Feedback output from the ‘F-Sync In’ signal. The feedback is taken after
any pulse processor for the output, but before the delay element.
Core Pre-trigger: Feedback output from the ‘Pre-trigger’ signal. The feedback is taken
after any pulse processor for the input.
Core Aux Trigger: Feedback output from the ‘Aux Trigger In’ signal. The feedback is taken
after any pulse processor for the input.
Core Trigger: Feedback output from the main ‘Trigger’ input. The feedback is taken before
the trigger signal is affected by the trigger polarity, filter or delay settings. ‘Core Trigger’
can be used like the ‘Trigger Out’ signal.
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