STV-5410-R01 STMICROELECTRONICS [STMicroelectronics], STV-5410-R01 Datasheet - Page 73

• Manufacturer Part Number: STV-5410-R01
• Description: Mono and Colour Digital Video CMOS Image Sensors
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

CMOS Sensor; Customer Datasheet, Rev 3.0, 28 September 2000
[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:
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).
Note : As we know from an explanation earlier in this document (see Section 6. for further details) the exposure control
1. Fine exposure.
2. Coarse exposure.
3. Analog gain.
4. Clock division
Index
1
2
7:3
32
33
Bit
Exposure Control Registers [32 - 47], [20-2F]
10
Retro mode for gain application
Off/On
Select log CDAC ramp
Off/On
Index
20
21
16
Function
Bits
7:0
0
Fine MSB exposure value
Fine LSB exposure value
Commercial in confidence
Table 45 : [24], [18] - Mode Select
cd5410-6410f-3-0.fm
Function
Default
0
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.
Default
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
Comment
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VV5410 & VV6410
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