CXD1257AR Просмотр технического описания (PDF) - Sony Semiconductor

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CXD1257AR

CCD Camera Timing Generator

Sony Semiconductor 

CXD1257AR

3-5. Shutter speed calculation formula

High-speed shutter

• NTSC

T = [26210 – (1FF16 – L16)] × 63.56 + 32.37µs

• PAL

T = [31210 – (1FF16 – L16)] × 64 + 32.14µs

(L16 = Load value)

Load value

0FA16

0FC16

10016

10816

11816

13716

17616

19616

NTSC

Shutter speed

1/10000

1/4000

1/2000

1/1000

1/500

1/250

1/125

1/100

Calculated value

1/10424

1/4483

1/2095

1/1014

1/499

1/252

1/125

1/100

Load value

0C816

0CA16

0CE16

0D616

0E616

10516

14316

14916

PAL

Shutter speed

1/10000

1/4000

1/2000

1/1000

1/500

1/250

1/125

1/120

Calculated value

1/10401

1/4461

1/2083

1/1008

1/496

1/250

1/125

1/120

Low-speed shutter

Shutter speed calculation formula

N = 2 × (1FF16 – L16) FLD

However, "1FF" cannot be used as the load value.

Load value

1FE16

1FD16

:

:

10116

10016

Shutter speed (FLD)

2

4

:

:

508

510

– 10 –

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