OV5620 Datasheet PDF - Ommivision

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OV5620
Ommivision

Part Number OV5620
Description Color CMOS QSXGA (5.17 MPixel) CAMERACHIP
Page 30 Pages


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Omni ision
®
Advanced Information
Preliminary Datasheet
OV5620 Color CMOS QSXGA (5.17 MPixel) CAMERACHIPTM with OmniPixel2TM Technology
General Description
The OV5620 (color) CAMERACHIPTM is a high performance
5.17 mega-pixel image sensor for digital still image and
video camera products.
This device incorporates a 2592 x 1944 image array and
an on-chip 10-bit A/D converter capable of operating at up
to 7.5 frames per second (fps) in full resolution. The
OV5620 can also output 864 x 600 resolution at 60 fps
enabling enhanced video viewing on TV. Proprietary
sensor technology utilizes advanced algorithms to cancel
Fixed Pattern Noise (FPN), eliminate smearing, and
drastically reduce blooming, dark current and lens
shading. The control registers allow for flexible control of
timing, polarity, and CAMERACHIP operation, which, in turn,
allows the engineer a great deal of freedom in product
design.
Note: The OV5620 is available in a
Pb lead-free package.
Features
• Optical black level calibration
• Video or snapshot operations
• Programmable/Auto Exposure and Gain Control
• Programmable/Auto White Balance Control
• Horizontal and vertical sub-sampling for high frame
rate with excellent image quality
• High frame rate output mode
• Programmable image windowing
• Variable frame rate control
• On-chip Luminance Average Counter
• VarioPixel® (binning) 1:2, 1:3, 1:4
• Subsampling (skip) 1:2, 1:3, 1:4, 1:8
• Flash control output (strobe pin)
• 50/60 Hz light auto detection
• Image vertical flip / horizontal mirror
• Defect pixel correction
• Internal/External frame synchronization
• Serial bus interface
• Power-on reset and power-down modes
Ordering Information
Product
OV05620-C03A (Color)
Package
CLCC-48
Applications
• Digital still cameras
• Digital video cameras
• PC camera/dual mode
• Video conference equipment
Key Specifications
Power Supply
Power
Requirements
Array Size
Analog
Digital
I/O
Active
Standby
Electronics Exposure
Shutter
Output Format
Lens Size
Lens Chief Ray Angle
Input Clock
Maximum System Clock
Maximum Data Rate
Full
Max Image
Transfer Rate
1.3Mpixel
D1MD
VGA
QVGA
Sensitivity
S/N Ratio
Dynamic Range
Scan Mode
Pixel Size
Dark Current
Fixed Pattern Noise
Image Area
Package Dimensions
2592 x 1944
2.6 ~ 3.0V
1.3V + 5%
1.7 ~ 3.3V
TBD
250 µA
1 TLINE to 1/F
where F = frame rate
Electronic rolling shutter,
snapshot
10-bit digital RGB Raw data
1/2.5"
12.5°
6 - 27 MHz
48 MHz
48 MHz
7.5 fps
30 fps
60 fps
60 fps
120 fps
TBD
TBD
TBD
Progressive
2.2 µm x 2.2 µm
TBD
TBD
5.808 mm x 4.294 mm
14.22 mm x 14.22 mm
Figure 1 OV5620 Pin Diagram (Top View)
30 29 28 27 26 25 24 23 22 21 20 19
NC 31
18 NC
NC 32
17 NC
DVDD 33
16 Y3
Y4 34
15 Y2
Y5 35
Y6 36
Y7 37
Y8 38
OV5620
14 Y1
13 Y0
12 EXP_STB
11 RESET_B
Y9 39
10 FREX
PCLK 40
9 PWDN
NC 41
8 NC
NC 42
7 NC
43 44 45 46 47 48 1 2 3 4 5 6
5620CLCC_DS_001
© 2006 OmniVision Technologies, Inc.
Version 1.1, May 9, 2006
VarioPixel, OmniVision, and the OmniVision logo are registered trademarks of OmniVision Technologies, Inc.
OmniPixel2 and CameraChip are trademarks of OmniVision Technologies, Inc.
These specifications are subject to change without notice.
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OV5620-CLCC Color CMOS QSXGA (5.17 MPixel) OmniPixel2™ CAMERACHIP
Omni ision
Functional Description
Figure 2 shows the functional block diagram of the
OV5620 image sensor. The OV5620 includes:
Image Sensor Array (2592+16) x (1944+4)
resolution)
Analog Amplifier
Gain Control
Balance Control
10-Bit A/D Converter
Test Pattern Generator
Digital Signal Processor (DSP)
Snapshot (Frame Exposure) Mode Timing
Frame Rate Adjust
SCCB Interface
Channel Average Calculator
Figure 2 Functional Block Diagram
Column Sense Amps
Image Array
AMP
Gain
Control
Buffer
Test
Pattern
Generator
10-Bit
A/D
Balance
Control
50/60 Hz
Auto
Detect
DSP
(White/black pixel
correction, etc.)
Control
Register
Bank
Y[9:0]
PCLK
HREF
VSYNC
CP
CN
DP
DN
Frequency
Doubler
Timing Generator and Control Logic
SCCB Slave
Interface
XVCLK
RESET_B
PWDN
FREX
EXP_STB
SCL
SDA
5620CLCC_DS_002
Image Sensor Array
The OV5620 sensor is a 1/2.5-inch CMOS imaging
device. The sensor contains 5,174,400 pixels. Figure 3
shows the color filter layout.
The color filters are in a Bayer pattern. The primary color
BG/GR array is arranged in line-alternating fashion. Of the
5,174,400 pixels, 5,080,384 are active. The other pixels
are used for black level calibration and interpolation.
The sensor array design is based on a field integration
read-out system with line-by-line transfer and an
electronic shutter with a synchronous pixel read-out
scheme.
Figure 3 Sensor Array Region Color Filter Layout
Column
R
o0 B G B G B G
w1 G R G R G R
2BG BG BG
3
4
5G R G R G R
6BG BG BG
7G R G R G R
8BG BG BG
1951 G R G R G R
1952 B G B G B G
1959 G R G R G R
BG BG BG
G RG RG R
BG BG BG
G RG RG R
BG BG BG
G RG RG R
BG BG BG
G RG RG R
BG BG BG
G RG RG R
Dummy
Dummy
Dummy
Optical
Black
Dummy
Dummy
Dummy
1944
Active
Lines
8
Dummy
Lines
5620CLCC_DS_003
2 Proprietary to OmniVision Technologies, Inc.
Version 1.1, May 9, 2006
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Omni ision
Functional Description
Analog Amplifier
When the column sample/hold circuit has sampled one
row of pixels, the pixel data will shift out one-by-one into
an analog amplifier.
Gain Control
The amplifier gain can either be programmed by the user
or controlled by the internal automatic gain control circuit
(AGC). The gain adjustment range is 0-24 dB.
Balance Control
Channel balance can be done manually by the user or by
the internal automatic white balance (AWB) controller.
10-Bit A/D Converter
The balanced signal is then digitized by the on-chip 10-bit
ADC. It can operate at up to 27 MHz and is fully
synchronous to the pixel clock. The actual conversion rate
is determined by the frame rate.
Test Pattern Generator
The Test Pattern Generator features the following:
• 8-bar color bar pattern
• Fade-to-gray color bar pattern
• Shift "1" in output pin
Digital Signal Processor (DSP)
• White/black pixel correction
• Lens shading correction
Windowing
The OV5620 allows the user to define window size or
region of interest (ROI), as required by the application.
Window size setting (in pixels) ranges from 2 x 4 to
2592 x 1944 (QSXGA) or 2 x 2 to 1280 x 960 (1.3 Mpixel)
and 640 x 480 (VGA), and can be anywhere inside the
2592 x 1944 boundary. The windowing control merely
alters the assertion of the HREF signal to be consistent
with the programmed horizontal and vertical ROI.
Figure 4 Windowing
Column
Start
HREF
R Column
o
w
Column
End
Row Start
Display
Window
Row End
Sensor Array
Boundary
5620CCLCC_DS_004
Version 1.1, May 9, 2006
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Proprietary to OmniVision Technologies, Inc.
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OV5620-CLCC Color CMOS QSXGA (5.17 MPixel) OmniPixel2™ CAMERACHIP
Omni ision
VarioPixel (Binning) 1:2, 1:3, 1:4
Figure 5 Horizontal/Vertical 1:2 Average (Binning)
B Gb B Gb
Gr R Gr R
B Gb
B Gb B Gb
Gr R
Gr R Gr R
5620CLCC_DS_005
Figure 6 Horizontal 1:3 Average (Binning)
Figure 9 Vertical 1:4 Average (Binning)
B Gb B Gb B Gb B Gb B Gb B Gb B Gb B Gb B Gb
Gr R Gr R Gr R Gr R Gr R Gr R Gr R Gr R Gr R
B Gb B Gb B Gb B Gb B Gb B Gb B Gb B Gb B Gb
Gr R Gr R Gr R Gr R Gr R Gr R Gr R Gr R Gr R
B Gb B Gb B Gb B Gb B Gb B Gb B Gb B Gb B Gb
Gr R Gr R Gr R Gr R Gr R Gr R Gr R Gr R Gr R
B Gb B Gb B Gb B Gb B Gb B Gb B Gb B Gb B Gb
Gr R Gr R Gr R Gr R Gr R Gr R Gr R Gr R Gr R
B Gb B Gb B Gb B Gb B Gb B Gb B Gb B Gb B Gb
Gr R Gr R Gr R Gr R Gr R Gr R Gr R Gr R Gr R
B Gb B Gb B Gb B Gb B Gb B Gb B Gb B Gb B Gb
Gr R Gr R Gr R Gr R Gr R Gr R Gr R Gr R Gr R
B Gb B Gb B Gb B Gb B Gb B Gb B Gb B Gb B Gb
Gr R Gr R Gr R Gr R Gr R Gr R Gr R Gr R Gr R
B Gb B Gb B Gb B Gb B Gb B Gb B Gb B Gb B Gb
Gr R Gr R Gr R Gr R Gr R Gr R Gr R Gr R Gr R
5620CLCC_DS_009
B Gb B Gb B Gb
Gr R Gr R Gr R
B Gb
Gr R
5620CLCC_DS_006
Figure 7 Vertical 1:3 Average (Binning)
B Gb
Gr R
B Gb
Gr R
B Gb
Gr R
B Gb
Gr R
B Gb
Gr R
B Gb
Gr R
B Gb
Gr R
B Gb
Gr R
5620CLCC_DS_007
Figure 8 Horizontal 1:4 Average (Binning)
B Gb B Gb B Gb B Gb B Gb B Gb B Gb B Gb
Gr R Gr R Gr R Gr R Gr R Gr R Gr R Gr R
Flash Control Output (Strobe Pin)
The OV5620 has a Strobe mode that allows it to work with
an external flash and LED.
Snapshot (Frame Exposure) Mode Timing
The OV5620 supports snapshot (frame exposure) mode.
Typically, the snapshot mode must work with the aid of an
external shutter.
The frame exposure pin, FREX (pin 10), is the snapshot
mode enable pin and the EXP_STB pin (pin 12) serves as
the sensor's exposure start trigger. When the external
master device asserts the FREX pin high, the sensor array
is quickly pre-charged and stays in reset mode until the
EXP_STB pin is pulled low (sensor exposure time can be
defined as the period between EXP_STB low to shutter
close). After the FREX pin is pulled low, the video data
stream is then clocked to the output port in a line-by-line
manner. After completing one frame of data output, the
OV5620 will output continuous live video data unless in
single frame transfer mode. Figure 17 shows detailed
timing of the Frame Exposure mode and Table 10 shows
the timing specifications for this mode.
When the OV5620 is working in snapshot mode, every
line is sampled at different times causing different dark
current levels line-by-line. To eliminate the dark current
difference, the OV5620 provides line optical black pixel
output. The difference in dark current can be calibrated
line-by-line.
B Gb
Gr R
5620CLCC_DS_008
4 Proprietary to OmniVision Technologies, Inc.
Version 1.1, May 9, 2006
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