EVK-5430-001 ST Microelectronics, Inc., EVK-5430-001 Datasheet - Page 27

• Manufacturer Part Number: EVK-5430-001
• Description: Monochrome Analog Output CMOS Image Sensors
• Manufacturer: ST Microelectronics, Inc.

VV5430
Header Code (fine)
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.
Exposure Control Thresholds T1 and T2
Header Code (T1)
Header Code (T2)
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.
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Valid data bits: 9
Valid data bits: 9
9 - 11
0 - 8
0 - 8
Bit
9-11
0-8
0-8
Bit
Coarse exposure value
Lower Exposure control threshold (T1)
Upper Exposure control threshold (T2)
Fine exposure value
Function
Unused
= 1000
= 1001
= 0100
Table 19 : Pixel Count Thresholds (T1,T2)
Unused
DAC
Table 18 : Exposure Values
0
0
CCIR
max
min
CD5430F-A
310
404
0
0
max
EIA
min
260
325
Header Code 1001
Header Code 1000
Comments
Header code 0011
Header code 0100
Comments
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