CXD2457R データシートの表示（PDF） - Sony Semiconductor

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CXD2457R

Timing Generator for Progressive Scan CCD Image Sensor

Sony Semiconductor 

CXD2457R

Detailed description

D19

EXPXEN

0: The EXP pulse indicating the exposure period is generated.

1: The EXP pulse indicating the exposure period is not generated, and is constantly fixed to low.

This bit is invalid when STATUS = 1.

Note that the STB setting has priority.

The data is reflected at the rise of XSGA.

D20

3MCK

0: 2MCK clock system

1: 3MCK clock system

This bit switches how MCK is comprised from the clock selected by FHIGH. Note that the

waveform is unstable for 5 clocks before and after switching.

D21

to

Invalid data

D23

D24

to

D28

VSHUT

Low-speed electronic shutter setting.

The value set here is the number of FR during which readout operation is not performed even if

there is input. The setting range is from 0 to 31. When set to 0, readout operation is performed at

the first VR.

When FS = 1, this bit is invalid.

MSB

LSB

Function

D28 D27 D26 D25 D24 Number of FR during which readout operation is not performed

D29

to

Invalid data

D31

CXD2457R clock system

When using a 30MHz crystal

Mode1

Mode2

Mode3

Mode4

Mode5

FHIGH

1

1

0

1

1

3MCK

0

1

0

0

1

FINE

1

0

0

0

1

MCK frequency 2MCK pin output

15MHz

30MHz

10MHz

15MHz

5MHz

10MHz

15MHz

30MHz

10MHz

15MHz

Note) Combinations of FHIGH, 3MCK and FINE other than those listed above are prohibited.

Frame rate

15Frame/s

30Frame/s

15Frame/s

45Frame/s

10Frame/s

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