VV5409C001 View Datasheet(PDF) - Vision
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VV5409C001 Datasheet PDF : 39 Pages
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VV5409 CMOS Monochrome Sensor Datasheet (Restricted) Rev 1.0
FST mode[1:0]
FST state
1
1
Enable FST as the De-bounce switch input
Table 6.15 : FST Modes
[21] - pin_mapping
Bit
Function
Default
Comment
0 Map serial-interface register bit values,
on to the QCK, and FST pins
Off/On
1 Serial-Interface Bit for QCK pin
2 Serial-Interface Bit for FST pin
4:3 Output driver strength select
7:5 Unused
0
0
0
01
Default setting selects 4mA driver.
Recommended setting is 00.
0
Table 6.16 : [21] - pin_mapping
Mapping Enable
FST pin
QCK pin
0
FST
QCK
1
pin_mapping[2]
pin_mapping[1]
Table 6.17 : FST/QCK Pin Selection
oeb_composite
su5[4] su5[3]
Comments
0
0
0
Drive strength = 2mA
0
0
1
Drive strength = 4mA (Default)
0
1
0
Drive strength = 6mA
0
1
1
unallocated
1
x
x
Outputs are not being driven, there-
fore driver strength is irrelevant
Table 6.18 : Output driver strength selection
Commercial In Confidence
cd38041a.fm
08/10/98
51
VV5409 CMOS Monochrome Sensor Datasheet (Restricted) Rev 1.0
[23] - op_format
Bit
Function
Default
Comment
1:0 Data format select
2 Embedded SAV/EAV Escape
Sequences
On / Off
3 Complementary Outputs
Off/On
4 Enable sample mode
Off/On
7:5 Unused
01
00 - reserved
01 - 4 wire parallel output
10 - 2 wire serial output
11 - 1 wire bit-serial output
0
0 - Insert Embedded Control Sequences, e.g
Start, and End of Active Video, into Output video-
data
1 - Pass-through mode. Output video-data equals
ADC data
1
If this bit is set, and 4-wire output is NOT
selected, then the complement of the output,
appears on either 1, or 2 of the output bus lines
1
If enabled, the data-bus will continuously output a
“96H” pattern. With the sensor in this mode, a
user can determine the best point at which to
sample the data
Table 6.19 : [23] - op_format
6.6.3 Exposure Control Registers [32 - 47]
There is a set of programmable registers, which control the sensitivity of the sensor. The registers are as
follows:
1. Fine exposure
2. Coarse exposure time
3. Gain
4. Clock division.
The gain parameter does not affect the integration period, rather it amplifies the video-signal at the output
stage of the sensor.
Note: The external exposure (coarse, fine, clock division or gain) values, do not take effect immediately. Data
from the serial-interface is read by the exposure algorithm at the start of a video-frame. If the user reads an
exposure value from the serial-interface, then the value reported will be the data which has not yet taken
effect with the exposure algorithm, because the serial-interface logic stores locally all the data written to the
sensor.
Between writing the exposure data, and the point at which the data is consumed by the exposure logic, bit-0
of the status register is set. The gain-value is updated a frame later than the coarse, fine, and clock division
parameters, since the gain is applied directly at the video-output stage, and does not require the long set-up
time of the coarse, and fine exposure, and the clock division.
To eliminate the possibility of the sensor-array seeing only part of the new exposure and gain setting, if the
serial-interface communications extends over a frame boundary, the internal re-timing of exposure and gain
data is disabled while writing data to any location in the Exposure page of the serial-interface register map.
Thus if the 5 bytes of exposure, and gain data, is sent as an auto-increment sequence, it is not possible for
the sensor to consume only part of the new exposure, and gain data.
Some parameters have a limited range of values. If any values are programmed out-with this range, they will
be clipped to the maximum value allowed.
Commercial In Confidence
cd38041a.fm
08/10/98
52
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