Fairchild CAM/CMOS-2K.LS user manual Video Data Signals, Camera Control Signals, Communication

Page 37

Video Data Signals

The Channel Link technology is integral to the transmission of video data. Image data and image enable signals are transmitted on the Channel Link bus. Four enable signals are:

FVAL-Frame Valid (FVAL) is defined HIGH for valid lines

(not used by the

 

CAM/CMOS – 2K.LS).

LVAL-Line Valid (LVAL) is defined HIGH for valid pixels

(LineValid Output in the

CAM

CMOS – 2K.LS).

DVAL-Data Valid (DVAL) is defined HIGH when data is valid

(Always High in the

 

CAM/CMOS – 2K.LS).

Spare- A spare has been defined for future use

(not used by the CAM/CMOS–

 

2K.LS).

In the general specification, all four enable signals must be provided by the camera on each Channel Link chip. All unused data bits must be tied to a known value by the camera.

For more information on image data bit allocations, refer to the official CameraLinkTM specification (http://www.machinevisiononline.org.).

Camera Control Signals

Four LVDS pairs are reserved for general-purpose camera control. They are defined as camera inputs and frame grabber outputs. Camera manufacturers can define these signals to meet their needs for a particular product. In the case of the Fairchild Imaging CAM/CMOS - 2K.LS, the signals are:

•

"ExSync" Line Synchonization Input

(generically Camera Control 1, CC1)

•

"ElectShutter" Exposure Control Input

(generically Camera Control 2, CC2)

•

Spare, unused

(generically Camera Control 3 ,CC3)

•

Spare, unused

(generically Camera Control 4, CC4)

Communication

Two LVDS pairs have been allocated for asynchronous serial communication to and from the camera and frame grabber. Cameras and frame grabbers should support at least 9600 baud. These signals are:

SerTFG

Differential pair serial communications to the frame grabber.

SerTC

Differential pair serial communications to the camera.

The serial interface will have the following characteristics: one start bit, one stop bit, no parity, and no handshaking. It is recommended that frame grabber manufacturers supply both a user interface and a software application programmming interface (API) for using the asynchronous serial communication port. The user interface will consist of a terminal program with minimal capabilities of sending and receiving a character string and sending a file of bytes. The software API will provide functions to enumerate boards and send or receive a character string.

Fairchild Imaging • CAM/CMOS-2K.LS Line Scan Camera User’s Manual • Rev C• 37 of 42

Page 36 Page 38
Image 37
Page 36 Page 38
Contents OWL Camera Series CAM/CMOS-2K.LS EMC EMC ConformanceTerminology CAM/CMOS-2K.LS Line Scan Camera Rev B Fairchild Imaging, IncTable of Contents Handling Instructions TroubleshootingProduct Support Camera Link IntroductionDescription Camera HighlightsProgrammability UsabilityFull Spectrum of Applications Camera Specification RDI and Mrdi Performance SpecificationLink Thermal ConsiderationsRDI and Mrdi Responsivity Curve Image Sensor Page Connectors, Pinouts, and Cables Installation OverviewCamera Hardware Interface Camera Pin # Frame Grabber Pin # Channel Link Signal Power SupplyHirose Receptacle LED Indicator Status LampBack View of CAM/CMOS 2K.LS Camera Control CommandsQuick Start with the Camera LinkTM Interface You must cover lens when performing this operation SSM LED Command Definition Summary Camera Command SummaryGSN Four Modes for Synchronizing with the CAM/CMOS 2K.LSSummary of CAM/CMOS-2K.LS Modes Line Start End 1 -- Mode 1 Freerunning 2 -- Mode 2 ExSync Synchronization ExSync Camera Input LineValid Camera Output ElectShutter CAM/CMOS-2K.LS Synchronization Timing ValuesMechanical and Optical Guidance Camera Dimensions and Mounting FacilitiesLens Mount Extender Tube LensingPage Page Positioning Accuracy of the Sensor Chip in the Camera LensesIllumination Light SourcesLens Modeling Handling Instructions Cleaning the Sensor WindowElectrostatic Discharge Preventing ESD DamageCheck the Obvious Things Out First TroubleshootingUse the Camera Control Interface to Perform Checks Other Areas You Should CheckNo Output Or Non Specification Output Data Clocking/Output SignalsEverything Seems To Be Working, But No Image Horizontal Lines or Patterns in OutputProduct Support Camera LinkTM Introduction Channel Link is a Widely-Used Signaling MethodCamera Control Signals Video Data SignalsCommunication Port Assignments PowerFor More Information on CameraLinkTM Figure A.1 Channel Link Operation Camera Link Connections -- the MDR 26-Pin ConnectorPage Page Figure A.4 Camera Link Cable
Top Page Image Contents