1M28, 1M75, and 1M150 User’s Manual
PRELIMINARY
33
DALSA
03-32-00525-04
Figure 26: Triggered Mode
CPRE
Line Pause
First Line
Line Pause
Last Line
Line Pause
EXSYNC is ignored in mode constant image data rate
PCLK
EXSYNC
FVAL
LVAL
DATA
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
CPRE
Line Pause
First Line
Line Pause
Last Line
Line Pause
EXSYNC is ignored in mode constant image data rate
PCLK
EXSYNC
FVAL
LVAL
DATA
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.
