Rolling Shutter External Exposure Triggering (Overlap Mode)

In overlap mode, every positive edge of an external trigger will trigger a frame read out and start a new exposure for the next frame. The period of external trigger pulse defines exposure and cycle time for each frame read out.

While waiting on the positive edge of the external trigger, the sensor is held in a global clear state and put into a “pre-scan read out cycle”. On detection of the positive edge, Global Clear goes LOW and a frame read out is initiated. This frame is discarded as it does not contain the correct exposure period. Reading out this first frame effectively begins the first exposure. When the next positive edge of the external trigger is detected, a signal frame read out phase begins. As each row is read out, the new exposure for that row begins.

Rolling Shutter External Exposure Triggering (Overlap Mode) (Long Exposures)

 

Rolling Shutter External Exposure Triggering (Overlap Mode) Timing Parameters

Parameter	Minimum	Maximum
Exposure	1 Frame + 1 Row	30 s
Cycle Time (EXT Trig Period)	Exposure	Exposure
External Start Delay	0	1 Row
EXT Trig Pulse Width	2 Sensor Speed Clock Cycles	-
FIRE low period	20 Sensor Speed Clock Cycles	-