PRELIMINARY
3.6 System Connection
F
R
A M E
G R A B B E R
LED TRIGGER (Inverted FRAME SEL)
FRAME SEL SIGNAL
HSYNC
VSYNC
VOLPI 18111.001
LED
Driver LED
Array
CAM
T A R G E T
How to operate in framing mode
1.The camera must be running in master mode.
•External sync signal cannot be present at power up.
2.Provide a LVDS active low “FRAME SEL” LVDS signal to pin 5 and pin 13 of the camera’s control connector (DB15).
READOUT TIME
EXPOSURE TIME
FRAME PULSE
1.Provide the LED with a trigger pulse that is active high during the camera’s exposure time.
•An inverted FRAME SEL pulse with LED driver could be used. This requires a LVDS receiver that will convert the FRAME SEL signal to TTL. This signal will turn ON a transistor or a FET to drive the LED light source.
•If a TTL signal is available from the frame grabber, this could directly drive the LED driver.
Fairchild Imaging •
