Dalsa 1M28-SA User Manual page 33

1M28, 1M75, and 1M150 User's Manual
EXSYNC
INTEGRATION
Triggered Mode with External Exposure Control
In triggered mode with external exposure control, sensor control is reset with the rising edge of an
external trigger pulse. The exposure of the image is controlled by the external signal PRIN. The
sensor control is clocked in such a way that that the image exposure becomes active one clock
later. The image is read out after the exposure time has elapsed. After readout, the sensor returns to
the reset state and the camera waits for a new trigger pulse.
The data is output on the rising edge of the pixel clock. The signals FRAME_VALID (FVAL) and
LINE_VALID (LVAL) mask valid image information. The signal INTEGRATION 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 section 1.12 Calculating Frame Rate).
Figure 27: Trigger Mode with External Exposure Control Timing Diagram
PCLK
EXSYNC
PRIN
INTEGRATION
Triggered Mode with External Edge Triggered
Exposure Control
In triggered mode with external edge exposure control, sensor control is reset with the rising edge
of an external trigger pulse, after which exposure of the image begins. The integration ends with
the rising edge of the external signal PRIN. The signals EXSYNC and PRIN are clocked in the
sensor control in such a way that the internal exposure control becomes active one clock later.
DALSA
PRELIMINARY
Figure 26: Triggered Mode
PCLK
FVAL
LVAL
DATA
FVAL
LVAL
DATA
EXSYNC is ignored in mode constant image data rate
CPRE
Line Pause
First Line
EXSYNC is ignored in mode constant image data rate
CPRE
Line Pause
First Line
Last Line
Line Pause Line Pause
Last Line Line Pause
Line Pause
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