OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

VV6501C001

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P45P46-P48P49-P51P52-P54P55-P57P58-P60
Functional Description VV6501
16/60
Timing of Frame Start signal (FST)
The frame-level position of FST is illustrated in
Figure 12
.
The FST pulse qualifies the Status Line information and is 648 QCKs (slow) long.
Figure 12: FST timing overview
Figure 13: Detailed FST timing
Start of Frame
Black Lines
Blanking Lines
Start of Frame
Black Lines
Blanking Lines
Visible Lines
End of Frame
Blanking Lines
FST:
1 Frame
0
H
1
H
0
H
1
H
F
H
F
H
1
H
9
H
C
H
7
H
0
H
7
H
0
H
7
H
4
H
0
H
0
H
7
H
0
H
7
H
8
H
0
H
0
H
0
H
Start of Frame Line Code
D
1
D
0
D
3
D
2
F
H
Frame start pulse qualifies status line: 648 QCKs
644 QCKs4 QCKs
Data Bus
FST pin:
17/60
VV6501 Functional Description
3.1.8 Image translations
The imaging array can be readout with different modes as described here below:
● Shuffle horizontal readout, bit [7] of serial register [17]. Even columns (2,4,6.) are readout first.
● Mirror horizontal readout, bit [3] of serial register [22]. Columns are readout in reverse order.
● Mirror vertical readout, enabled by setting [4] of serial register [22]. Rows are readout in
reverse order.
Figure 14: Image readout modes
(a) Standard image readout (b) Horizontal shuffle enabled
(c) Horizontal mirror enabled (d) Vertical mirror enabled
Functional Description VV6501
18/60
3.1.9 Dark calibration
In order to produce a high quality output image from the VV6501, it is necessary to accurately
control the black level of the video signal. There are two main sources of error:
● Dark current
● Offsets in the output path.
The black level is corrected by using dark pixel rows to “learn” the offset so that it can then be
subtracted from the image data. Dark rows have the same exposure setting as the visible lines but
are shielded from incident light.
For 10-b data the ideal “black” code is set to be 64 (when viewing 8-b data the ‘black’ code should
be 16). The aim of the dark calibration algorithm is to “learn” the offset required such that “black”
image lines have code 64.
Figure 15: Overview of dark offset cancellation
Figure 16: Role of dark offset calibration
Dpix
Vpix
Column
ADC element
+ offset
Dpix
Vpix
10-b
Column
ADC element
+ offset
10-b
Normal pixel
Idark
Dark pixel
Ilight
+
Idark
Offset
cancellation
Learn offset
+ Idark
Digital Logic
Dark Line
typ. value = 400
Image Line
typ. value: 400 - 1360
Dark calibration
dark offset = 336
Dark Line
typ. value = 64
Image Line
typ. value: 64-1024
processed imageraw image
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P45P46-P48P49-P51P52-P54P55-P57P58-P60

VV6501C001

Mfr. #:
Buy VV6501C001
Manufacturer:
STMicroelectronics
Description:
Video ICs Color Sensor for STV0674 or STV0676
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet