參數(shù)資料
型號(hào)： VV5410
廠商： 意法半導(dǎo)體
英文描述： Mono and Colour Digital Video CMOS Image Sensors
中文描述： 莫諾和數(shù)字視頻彩色CMOS圖像傳感器
文件頁(yè)數(shù)： 73/105頁(yè)
文件大?。?/td> 489K
代理商： VV5410
CMOS Sensor; Customer Datasheet, Rev 3.0, 28 September 2000
VV5410 & VV6410
Commercial in confidence
cd5410-6410f-3-0.fm
[25-31],[19-1F]- unused
9.5.3
There is a set of programmable registers which controls the sensitivity of the sensor. The registers are as follows:
Exposure Control Registers [32 - 47],[20-2F]
1. Fine exposure.
2. Coarse exposure.
3. Analog gain.
4. Clock division
Note: As we know from an explanation earlier in this document (see Section 6. for further details) the exposure control
registers are not updated immediately, rather they are timed to be updated at a precise point in the field timing.
The range of some parameter values is limited and any value programmed out-with this range will be clipped to the maximum
currently permitted, (the fine and coarse maximum allowable settings are set by the current line and field length respectively).
1
Retro mode for gain application
Off
/On
0
The gain passed to the CAB comprises 2 components,
IDAC[3:0] and CDAC[5:0]. If the user selects the retro
mode then the IDAC value will be the inverse of the ls
gain nibble. The user is barred from writing to the ms
gain nibble. In the non retro mode all 8 bits are availa-
ble to program. The 2 ls bits of CDAC[5:0] are fixed at
2’b11.
By default the same CDAC value is applied for the
duration of every line of every field. Setting this bit
causes the CDAC value to be varied during the line.
2
Select log CDAC ramp
Off
/On
0
7:3
Index
10
32
33
Index
16
20
21
Bits
Function
Default
Comment
0
Fine MSB exposure value
Fine LSB exposure value
0
The maximum fine exposure is line
length dependent. The expressions
used to calculate the maximum fine
exposure for each of the default
video modes, that can be selected
via Setup0 register, are as follows
NTSC = line length - 51
PAL = line length - 86
CIF = line length - 51
QCIF = line length - 23
7:0
Bit
Function
Default
Comment
Table 45 : [24],[18]- Mode Select
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