MV-D752-28 User’s Manual
REV: 1.0
Page 15/61
5.2
Trigger mode
In trigger mode image acquisition begins with the rising edge of an external trigger pulse
(POLARITY_SYNC_EXPOSURE = ‘1’). The image will be read out after the preset exposure
time. After readout, the sensor returns to the reset state and the camera waits for a new
trigger pulse. If necessary, the polarity of the EXSYNC signal can be matched to that of
the frame grabber by means of the flag POLARITY_SYNC_EXPOSURE bit 3 mode register
3.
The data are output on the rising edge of the pixel clock. The signals FRAME_VALID
(FVAL) and LINE_VALID (LVAL) mask valid image information. The signal SHUTTER
indicates the active integration phase of the sensor. The number of clock pulses after
exposure
CPRE
is defined by the calculation of the frame time (see 9).
Fig. 6: Timing Diagram Trigger Mode
EXSYNC is ignored in mode constant image data rate
PCLK
SHUTTER
FVAL
EXPOSURE
DATA
EXSYNC
LVAL
line pause
first line line pause last line
CPRE
Integration
line paus
e