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4. Camera mode
21
4.2.4.
Trigger mode
This mode is for starting exposure by synchronization
with the external trigger input (12-pin or 26-pin
connector) and then outputting the individual video
signals of all pixels after the time that was set for the
shutter elapses. There is the edge detection mode for
detecting the rise edge of the external trigger signal and
the width detection mode for detecting the effective
period of the trigger. The period of the external trigger
signal cannot be set shorter than the shutter speed.
Furthermore, if the shutter is set to OFF, the shutter
speed is automatically set to 1/15 s.
1
T 1
T2
T3
2050 H
2448 CLK
72 CLK
2050
1
2050
T 4
Trigger
Example of positive electrode (The horizontal timing is the same as in the normal mode.)
FVAL
LVAL
DVAL
Video
output
TRG
*
*
There is only one LVAL which is less than 2448 CLK during T4
length in order to adjust the timing. T4 changes by depending
on T1.
Trigger mode
T1
T2
Shutter
T3 [ms]
Edge detection
mode
More than 67 ms
More than 10 µs
OFF
68.16
1/15 s
68.16
1/30 s
34.82
1/100 s
11.5
1/120 s
9.82
1/250 s
5.5
1/500 s
3.5
1/1000 s
2.5
1/2000 s
2
1/5000 s
1.7
1/10000 s
1.6
1/7.5 s
134.8
1/2 s
501.5
1 s
1000
2 s
2000
Width detection
mode
More than 67 ms
More than 10 µs and
less than 2 s
–
T2 + 0.52