CXD2401R データシートの表示（PDF） - Sony Semiconductor

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CXD2401R

Electronic Iris Control IC

Sony Semiconductor 

CXD2401R

Control pin

Detailed description

The operations of SPUPV, IRIN, and SPDNV pins differ according to the mode (IRENB control)

of the electronic iris and electronic shutter. The operations are described below for each case.

IRENB = Low: When the operation of electronic shutter is assigned

PS = Low: When inputting serial data is assigned

SPUPV : Strobe input pin

IRIN : Clock input pin

SPDNV : Data input pin

SPUPV

(Pin 38)

IRIN

(Pin 39)

SPDNV

(Pin 40)

SPDNV (ED2)

D7

IRIN (ED1)

SPUPV (ED0)

Ld : Shutter speed data

Ex.: Ld = 100 [decimal]

D6

D5

D4

D3

D2

D1

D0

MSB

LSB

D7 D6 D5 D4 D3 D2 D1 D0

01100100

<Shutter speed calculation formula> Shutter speed = 1/n [s]

Ld

(decimal)

NTSC: NTSC (Pin 48) = L

n = 1/m × 106

m

Ld

(decimal)

PAL: NTSC (Pin 48) = H

n = 1/m × 106

m

255 to 248 [261 – {(255 – Ld) × 7 + 2}] × 63.56 + 31 255 to 251 [311 – {(255 – Ld) × 10 + 2}] × 64 + 30.77

247 to 241 [261 – {(247 – Ld) × 5 + 58}] × 63.56 + 31 250 to 243 [311 – {(250 – Ld) × 7 + 52}] × 64 + 30.77

240 to 232 [261 – {(240 – Ld0 × 4 + 93}] × 63.56 + 31 242 to 236 [311 – {(242 – Ld) × 5 + 108}] × 64 + 30.77

231 to 220 [261 – {(231 – Ld) × 3 + 129}] × 63.56 + 31 235 to 227 [311 – {(235 – Ld) × 4 + 143}] × 64 + 30.77

219 to 202 [261 – {(219 – Ld) × 2 + 165}] × 63.56 + 31 226 to 215 [311 – {(226 – Ld) × 3 + 179}] × 64 + 30.77

201 to 151 [261 – {(201 – Ld) × 1 + 201}] × 63.56 + 31 214 to 197 [311 – {(214 – Ld) × 2 + 215}] × 64 + 30.77

150 to 114 [875 – {(150 – Ld) × 11 + 253}] × 0.978 + 0.047 196 to 146 [311 – {(196 – Ld) × 1 + 251}] × 64 + 30.77

113 to 107 [875 – {(113 – Ld) × 5 + 660}] × 0.978 + 0.047 145 to 109 [923 – {(145 – Ld) × 11 + 303}] × 0.987 + 0.721

106 to 98 [875 – {(106 – Ld) × 4 + 695}] × 0.978 + 0.047 108 to 102 [923 – {(108 – Ld) × 5 + 710}] × 0.987 + 0.721

97 to 86 [875 – {(97 – Ld) × 3 + 731}] × 0.978 + 0.047 101 to 93 [923 – {(101 – Ld) × 4 + 745}] × 0.987 + 0.721

85 to 69 [875 – {(85 – Ld) × 2 + 767}] × 0.978 + 0.047 92 to 81 [923 – {(92 – Ld) × 3 + 781}] × 0.987 + 0.721

68 to 0 [875 – {(68 – Ld) × 1 + 801}] × 0.978 + 0.047 80 to 64 [923 – {(80 – Ld) × 2 + 817}] × 0.987 + 0.721

63 to 0 [923 – {(63 – Ld) × 1 + 851}] × 0.987 + 0.721

– 10 –

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