Video Data; Camera Control Signals; Communication - Dalsa Piranha 3 Series User Manual

72

Video Data

The Channel Link technology is integral to the transm ission of vid eo d ata. Im age d ata and
im age enable signals are transm itted on the Channel Link bu s. Fou r enable signals are
d efined as:
• FVAL—Fram e Valid (FVAL) is d efined H IGH for valid lines.
• LVAL—Line Valid (LVAL) is d efined H IGH for valid pixels.
• DVAL—Data Valid (DVAL) is d efined H IGH w hen d ata is valid .
• Spare— A spare has been d efined for fu tu re u se.
All fou r enable signals m u st be provid ed by the cam era on each Channel Link chip. All
u nu sed d ata bits m u st be tied to a know n valu e b y the cam era. For m ore inform ation on
im age d ata bit allocations, refer to the official Cam era Link specification on the Web site,
available

Camera Control Signals

Fou r LVDS pairs are reserved for general-pu rpose cam era control. They are d efined as
cam era inpu ts and fram e grabber ou tpu ts. Cam era m anu factu rers can d efine these signals
to m eet their need s for a particu lar prod u ct. The signals are:
• Cam era Control 1 (CC1)
• Cam era Control 2 (CC2)
• Cam era Control 3 (CC3)
• Cam era Control 4 (CC4)
The Piranha 3 u ses the follow ing cam era control signals:
Table 15: Camera Control Configuration
C1
CC2
CC3
CC4

Communication

Tw o LVDS pairs have been allocated for asynchronou s serial com m u nication to and from
the cam era and fram e grabber. Cam eras and fram e grabbers shou ld su pport at least 9600
bau d . These signals are
• SerTFG—Differential pair w ith serial com m u nications to the fram e grabber.
• SerTC—Differential pair w ith serial com m u nications to the cam era.
The serial interface w ill have the follow ing characteristics: one start bit, one stop bit, no
parity, and no hand shaking. It is recom m end ed that fram e grabber m anu factu rers su pply
both a u ser interface and a softw are application program m m ing interface (API) for u sing
the asynchronou s serial com m u nication port. The u ser in terface w ill consist of a term inal
program w ith m inim al capabilities of send ing and receiving a character string and
send ing a file of bytes. The softw are API w ill provid e fu nctions to enu m erate board s and
03-032-10216-06
All manuals and user guides at all-guides.com
here.
EXSYNC, negative ed ge active
PRIN
Not Used
Not Used
Piranha 3 User Manual
Teledyne DALSA