84
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Camera Link Interface
Xtium-CL PX4 User's Manual
Camera Signal Summary
Video Data
Four enable signals are defined as:
•
FVAL
Frame Valid (FVAL) is defined HIGH for valid lines
•
LVAL
Line Valid (LVAL) is defined HIGH for valid pixels
•
DVAL
Data Valid (DVAL) is defined HIGH when data is valid
•
Spare
A spare has been defined for future use
The camera provides the four enables on each Channel Link. All unused data bits must be set to a
known value by the camera.
Camera Controls
Four LVDS pairs are reserved for general-purpose camera control, defined as camera inputs and
frame grabber outputs.
•
Camera Control 1 (CC1)
•
Camera Control 2 (CC2)
•
Camera Control 3 (CC3)
•
Camera Control 4 (CC4)
Note: the Xtium-CL PX4 by default implements the control lines as follows,
(using Teledyne DALSA terminology):
(CC1) EXYNC
(CC2) PRIN
(CC3) FORWARD
(CC4) HIGH
Communication
Two LVDS pairs are allocated for asynchronous serial communication to and from the camera and
frame grabber. Cameras and frame grabbers should support at least 9600 baud.
•
SerTFG
Differential pair with serial communications to the frame grabber
•
SerTC
Differential pair with serial communications to the camera
The serial interface protocol is one start bit, one stop bit, no parity, and no handshaking.
Camera Link Cables
For additional information on Camera Link cables and their specifications, visit the following web
sites:
3 M
http://www.3m.com/interconnects
(enter Camera Link as the search keyword)
Nortech Systems
http://www.nortechsys.com/intercon/CameraLinkMain.htm
Table 33: Camera Link Cables Suppliers
