Photon Focus MV2-D1280-640, User Manual, Page: 51 / 85

5.4 Trigger
5.4.1 Trigger Modes
The following sections show the timing diagram for the trigger modes. The signal ExSync
denotes the trigger signal that is provided either by the interface trigger or the I/O trigger (see
Section 4.6). The other signals are explained in Table 5.4.
Camera-controlled Exposure
In the camera-controlled trigger mode, the exposure is defined by the camera and is
configurable by software. For an active high trigger signal, the image acquisition begins with
the rising edge of the trigger signal. The image is read out after the pre-configured exposure
time. After the readout, the sensor returns to the reset state and the camera waits for a new
trigger pulse (see Fig. 5.10).
The data is output on the rising edge of the pixel clock, the handshaking signals
FRAME_VALID
( FVAL ) and LINE_VALID ( LVAL ) mask valid image information. The signal SHUTTER in Fig. 5.10
indicates the active integration phase of the sensor and is shown for clarity only.
P C L K
S H U T T E R
F V A L
L V A L
D V A L
D A T A
L i n e p a u s e
L i n e p a u s e L i n e p a u s e
F i r s t L i n e L a s t L i n e
E x p o s u r e
T i m e
F r a m e T i m e
E X S Y N C
C P R E
Figure 5.10: Trigger timing diagram for camera controlled exposure
5.4 Trigger 49