CXD2460R 데이터 시트보기 (PDF) - Sony Semiconductor

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CXD2460R

Timing Generator for Progressive Scan CCD Image Sensor

Sony Semiconductor 

CXD2460R

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/XSGB pulses. 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 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 20 lines swept every 1H and repeating over a 69H period.

During period X, first XSGA/XSGB are generated. These pulses are dependent on serial data

D15

,


,

,

,
,
,

,, FS

FINE. In other words, if FINE = 1, then both XSGA and XSGB are generated, while if FINE = 0,

only XSGA is generated. Next, sweep operation starts. This period is set in serial data FVFS

(system setting data: D21 to D26) in HRI units. If FINE = 1, sweeping is performed at 8 lines per

1H, and if FINE = 0, sweeping is performed at 20 lines per 1H.

The operations of V1, V2 and V3 after readout during period Y differ depending on the FINE

data.

• 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

69H

(Fix)

X

Set by FVFS

Reset by FRI after

normal transfer

Y

1068

 D16

 to

Set to "0".

D17

– 14 –

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