Photon Focus OEM-D1024E, Руководство пользователя

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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 4.7). The other signals are explained in Table 5.6.
Camera module controlled Exposure
In the camera module controlled trigger mode, the exposure is defined by the camera module
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 module
waits for a new trigger pulse (see Fig. 5.7).
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. 5.7
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 5.7: Trigger timing diagram for camera module controlled exposure
5.4 Trigger 55