參數(shù)資料
型號: VV5430C001
廠商: 意法半導(dǎo)體
英文描述: Monochrome Analog Output CMOS Image Sensors
中文描述: 單色模擬輸出CMOS圖像傳感器
文件頁數(shù): 27/33頁
文件大小: 256K
代理商: VV5430C001
VV5430
Write to Camera
CD5430F-A
27/33
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.
Exposure Control Thresholds T1 and T2
Header Code (T1)
= 1000
Valid data bits: 9
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
Function
CCIR
min
max
EIA
min
max
Comments
0-8
Coarse exposure value
0 310
0 260
Header code 0011
0-8
Fine exposure value
0 404
0 325
Header code 0100
9-11
Unused
Table 18 : Exposure Values
Bit
DAC
Comments
0 - 8
Lower Exposure control threshold (T1)
Header Code 1000
0 - 8
Upper Exposure control threshold (T2)
Header Code 1001
9 - 11
Unused
Table 19 : Pixel Count Thresholds (T1,T2)
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