Piranha 3 User Manual
Teledyne DALSA
03-032-10216-06
71
Appendix A
Camera Link™ Reference,
Timing, and
Configuration Table
Cam era Link is a com m u nication interface for vision ap p lications. It p rovid es a
connectivity stand ard betw een cam eras and fram e grabbers. A stand ard cable connection
will reduce manufacturers’ support time and greatly reduce the level of complexity and
tim e need ed for cu stom ers to su ccessfu lly integrate high sp eed cam eras w ith fram e
grabbers. This is p articu larly relevant as signal and d ata transm issions increase both in
com p lexity and throu ghp u t. A stand ard cable/ connector assem bly w ill also enable
cu stom ers to take ad vantage of volu m e p ricing, thu s red u cing costs.
The cam era link stand ard is intend ed to be extrem ely flexible in ord er to m eet the need s
of d ifferent cam era and fram e grabber m anu factu rers.
The
Cam era Link Im p lem entation Road Map
(available from the link) d etails how w e
stand ard ize the u se of the Cam era Link interface.
LVDS Technical Description
Low Voltage Differential Signaling (LVDS) is a high-sp eed , low -p ow er general p u rp ose
interface stand ard . The stand ard , know n as AN SI/ TIA/ EIA -644, w as ap p roved in March
1996. LVDS u ses d ifferential signaling, w ith a nom inal signal sw ing of 350m V d ifferential.
The low signal sw ing d ecreases rise and fall tim es to achieve a theoretical m axim u m
transm ission rate of 1.923 Gbp s into a loss-less m ed iu m . The low signal sw ing also m eans
that the stand ard is not d ep end ent on a p articu lar su p p ly voltage. LVDS u ses cu rrent -
m od e d rivers, w hich lim it p ow er consu m p tion. The d ifferential signals are im m u ne to ±1
V com m on volt noise.
Camera Signal Requirements
This section p rovid es d efinitions for the signals u sed in the Cam era Link interface. The
stand ard Cam era Link cable p rovid es cam era control signals, serial com m u nication, and
vid eo d ata.
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