VV5409 View Datasheet(PDF) - Vision
Part Name
Description
MFG CO.
'VV5409' PDF : 39 Pages View PDF
VV5409 CMOS Monochrome Sensor Datasheet (Restricted) Rev 1.0
8. Synchronising Multiple Cameras
A rising edge on the SIN pin re-synchronises the sensors internal video timing logic and clock generators to
6 pixels before the end of the start of frame control sequence in line 0. By supplying a rising edge to SIN once
per frame, 2 cameras can be synchronised together. Via the serial interface the function of the FST pin can
be modified to generate the required synchronisation output signal (SNO). Synchronising cameras is done
by setting one camera up as the master and feeding its SNO signal to the SIN input of the other cameras.
Note: The correct functionality of the SNO output has not been verified.
The internal logic is designed such that if the rising edge of SIN occurs in the correct place, 6 pixels (for the
default pixel counter reset value) before the end of the start of frame control sequence, the sensor’s operation
is unaffected. Otherwise the video timing and clock generation will be reset. The following frame should be
treated as corrupt.
SIN is sampled internally by the system clock, CKI. If all cameras are supplied with the same clock signal
then the reset generated by SIN will synchronise all the cameras to the same point in time. However, if the
cameras being synchronised are running at the same frequency but each camera has its own crystal, then
there could be up to one system clock period of skew between the cameras. This skew will vary over time
due to the slight mismatches between frequencies of the different crystals.
Frame/Field Format:
1st Field
1 Frame
2nd Field
VV5409 CMOS Monochrome Sensor Datasheet (Restricted) Rev 1.0
Start of Field Line Format:
EAV
1 Line
6 Pixels
SAV
356/306 Pixels
Status Information
EAV
Synchronisation Output (SNO) from the master sensor (functionality not verified)..
Figure 8.2 : Synchronisation Waveforms - Line Level Timing.
FST:
(ii) Off
(ii) On
(iii) SNO
Figure 8.1 : FST and SNO Signals - Frame / Field Level Timing
Commercial In Confidence
Commercial In Confidence
cd38041a.fm
08/10/98
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cd38041a.fm
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