CXD2457R Ver la hoja de datos (PDF) - Sony Semiconductor
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CXD2457R Datasheet PDF : 37 Pages
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CXD2457R
Detailed description
0: Normal operation
1: FS mode
In order to increase the frame rate, a certain portion of the captured image of CCD can be cut out
by performing high-speed sweep.
In FS mode, high-speed sweep is performed for the V registers of the entire image (period Z)
after FRI input. Next, high-speed sweep is performed again for only the desired period (period X)
after generating the XSGA pulse. Then, after performing normal V transfer and outputting the
effective signal (period Y), high-speed sweep is performed for the entire image again by inputting
D14
,,,,,,,,, FS
FRI at the desired timing. This makes it possible to take only the desired portion in the V
direction, thus effectively increasing the frame rate.
Operation is fixed during period Z, with 22 lines swept every 1H and repeating over a 36H period.
During period X, first XSGA is generated, then sweep operation starts. This period is set in serial
data FVFS (system setting data: D21 to D26) in HRI units.
Be sure to set FINE = 0 in this mode.
• When the frame rate is increased as the
vertical effective signal Y line (example)
X
Sweep variable period (period X)
Effective signal period (period Y)
Y
Sweep fixed period (period Z)
Z
Timing chart
FRI
Z
V2A
36H
(Fix)
X
Set by FVFS
Reset by FRI after
normal transfer
Y
1068
D15
to
Set to 0.
D16
– 14 –
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