VV5430 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

VV5430

Monochrome Analog Output CMOS Image Sensors

STMicroelectronics 

VV5430

Write to Camera

Header Code (fine)

= 0100

Valid data bits: 9

The 18 bit exposure control value is formed from two 9-bit values, coarse (9 msb’s) and fine (9 lsb’s). For external exposure

control (AEC = 0) the exposure value can be set via the serial interface (header codes 0011 and 0100). Values written that

exceed the mode dependant maxima will be ignored and the maximum will be used.

Bit

Function

CCIR

EIA

min

min

max

max

0-8 Coarse exposure value 0

310 0

260

0-8

Fine exposure value

0

404 0

325

9-11

Unused

Table 18 : Exposure Values

Comments

Header code 0011

Header code 0100

Exposure Control Thresholds T1 and T2

Header Code (T1)

Valid data bits: 9

= 1000

Header Code (T2)

= 1001

Valid data bits: 9

The lower and upper pixel count thresholds are used by the automatic exposure controller. The power-on default values for T1

and T2 are exposure mode and video mode dependant. If the external pixel threshold control bit (bit 6 in Setup Code_2 register)

is set the internal default values for T1 and T2 are overridden by the serial interface values. Note that only the most significant

nine bits of each seventeen bit threshold can be controlled.

Bit

0-8

0-8

9 - 11

DAC

Comments

Lower Exposure control threshold (T1)

Header Code 1000

Upper Exposure control threshold (T2)

Header Code 1001

Unused

Table 19 : Pixel Count Thresholds (T1,T2)

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CD5430F-A

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