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PDF OV6120 Data sheet ( Hoja de datos )
| Número de pieza | OV6120 | |
| Descripción | (OV6120 / OV6620) SINGLE-CHIP CMOS CIF COLOR DIGITAL CAMERA | |
| Fabricantes | ETC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de OV6120 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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Advanced Information
Preliminary
heOOeVVt466U6122.c00oSSmIINNGGLLEE--CCHHIIPP CCMMOOSS CCIIFF CBO&WLODROIGDVIITG6A6ITL2AC0L/AOCMAVEM6R1EA2R0AFeatures
Sn 101,376 pixels, 1/4” lens, CIF/QCIF format
tan Progressive scan read out
an Data format - YCrCb 4:2:2, GRB 4:2:2, RGB Raw Data
.Dn 8/16 bit video data: CCIR601, CCIR656, ZV port
wn Wide dynamic range, anti-blooming, zero smearing
w n Electronic exposure / Gain / white balance control
w n Image enhancement - brightness, contrast, gamma,
saturation, sharpness, window, etc.
mn Internal/external synchronization
oGeneral Description
.cThe OV6620 (color) and OV6120 (black and white) CMOS Im-
age sensors are single-chip video/imaging camera devices
designed to provide a high level of functionality in a single,
Usmall-footprint package. Both devices incorporate a 352 x 288
image array capable of operating up to 60 frames per second
t4image capture. Proprietary sensor technology utilizes ad-
vanced algorithms to cancel Fixed Pattern Noise (FPN), elim-
inate smearing, and drastically reduce blooming. All needed
n Frame exposure/line exposure option
n 5-Volt operation, low power dissipation
– < 80 mW active power
– < 10 µA in power-save mode
n Gamma correction (0.45/0.55/1.00)
n I2C programmable (400 kb/s):
– color saturation, brightness, contrast, white balance,
exposure time, gain
camera functions including exposure control, gamma, gain,
white balance, color matrix, windowing, and more, are pro-
grammable through an I2C interface. Both devices can be pro-
grammed to provide image output in either 8-bit or 16-bit
digital formats.
Applications include: Video Conferencing, Video Phone, Vid-
eo Mail, Still Image, and PC Multimedia.
ee Array Elements (CIF)
(QCIF)
h Pixel Size
356 x 292
(176 x 144)
9.0 x 8.2 µm
S Image Area
3.1 x 2.5 mm
ta Max Frames/Sec
Up to 60 FPS
aAGND
AVDD
PWDN
.DVRCAP1
VRCAP3
IICB
wVTO
ADVDD
ADGND
wVSYNC/CSYS
FODD/CLK
w .comHREF/VSFRAM
7
8
9
10
11
12
13
14
15
16
17
18
OV6620/OV6120
42 BW/CHSYNC
41 CBAR/Y0
40 Y1
39 G2X/Y2
38 RGB/Y3
37 CS1/Y4
36 SHARP/Y5
35 CS2/Y6
34 CS0/Y7
33 PWDB/PCLK
32 DOVDD
31 DGND
Electronic
Exposure
Scan Mode
Gamma Correction
Min. Illumination
(3000K)
S/N Ratio
(Digital Camera Out)
FPN
Dark Current
Up to 500 : 1
(for selected FPS)
progressive
0.45/.55/1.0
OV6620 - < 3 lux @ f1.2
OV6120 - < 0.5 lux @ f1.2
> 48 dB
(AGC = Off, Gamma = 1)
< 0.03% VP-P
< 0.2 nA/cm2
UDynamic Range
> 72 dB
et4Power Supply
5VDC, ±5% (Anal.)
5VDC or 3.3VDC (DIO)
taSheOV6620/OV6120 PIN ASSIGNMENTS
Power
Requirements
Package
< 80mW Active
< 30µW Standby
48 pin LCC
.DaOmniVision Technologies, Inc. 930 Thompson Place Sunnyvale, CA 94086 U.S.A.
wTel: (408) 733-3030 Fax: (408) 733-3061
we-mail: [email protected]
wWebsite: http://www.ovt.com
Version 1.11, 14 May 1999
1 page  
OMNIVISION TECHNOLOGIES, Inc.
Advanced Information
Preliminary
OV6620/OV6120
SINGLE IC CMOS COLOR AND B/W DIGITAL CAMERAS
1.2 Analog Processor Circuits
1.2.1 Overview
The image is captured by the 356 x 592 pixel image ar-
ray and routed to the analog processing section where
the majority of signal processing occurs. This block con-
tains the circuitry which performs color separation, ma-
trixing, Automatic Gain Control (AGC), gamma
correction, color correction, color balance, black level
calibration, “knee” smoothing, aperture correction, and
controls for picture luminance, chrominance, and anti-
alias filtering. The analog video signals are based on
the following formula:
Y = 0.59G + 0.31R + 0.11B
U = R-Y
V = B-Y
where R,G,B are the equivalent color components in
each pixel.
A YCrCb format is also supported, based on the formula
below:
Y = 0.59G + 0.31R + 0.11B
Cr = 0.713 x (R - Y)
Cb = 0.564 x (B - Y)
The YCrCb/RGB Raw Data signal from the analog pro-
cessing section is fed to two on-chip 8-bit Analog-to-
Digital (A-to-D) converters: one for the Y/RG channel
and one shared by the CrCb/BG channels. The A-to-D
converted data stream is further conditioned in the digi-
tal formatter. The processed signal is delivered to the
digital video port through the video multiplexer which
routes the user-selected 16-, 8-, or 4-bit video data the
correct output pins.
The on-chip 8-bit A-to-D converters operate at up to 9
MHz, fully synchronous to the pixel rate. Actual conver-
sion rate is set as a function of the frame rate. A-to-D
black-level calibration circuitry ensures the following:
– the black level of Y/RGB is normalized to a value of 16
– the peak white level is limited to 240
– CrCb black level is 128
– Peak/Bottom is 240/16
– RGB raw data output range is 16/240
(Note: Values 0 and 255 are reserved for sync flag)
1.2.2 Image Processing
The algorithm used for the electronic exposure control
is based on the brightness of the full image. The expo-
sure is optimized for a “normal” scene which assumes
the subject is well lit relative to the background. In situ-
ations where the image is not well lit, the Automatic Ex-
posure Control (AEC) White/Black ratio may be
adjusted to suit the needs of the application.
Additional on-chip functions include Automatic Gain
Control (AGC) which provides a gain boost of up to
24dB. White balance control enables setting of proper
color temperature and can be programmed for automat-
ic or manual operation. Separate saturation, brightness,
contrast, and sharpness adjustments allow for further
fine tuning of the picture quality and characteristics. The
OV6620 image sensor also provides control over the
White Balance ratio for increasing/decreasing the im-
age field Red/Blue component ratio. The sensor pro-
vides a default setting which may be sufficient for many
applications.
1.2.3 Windowing
The windowing feature of the OV6620/OV6120 image
sensors allows user-definable window sizing as re-
quired by the application. Window size setting (in pixels)
ranges from 2 x 2 to 356 x 292, and can be positioned
anywhere inside the 356 x 292 boundary. Note that
modifying window size and/or position does not change
frame or data rate. The OV6620/OV6120 imager alters
the assertion of the HREF signal to be consistent with
the programmed horizontal and vertical region. The de-
fault output window is 352 x 288.
1.2.4 Zoom Video Port (ZV)
The OV6620/OV6120 image sensor includes a Zoom
Video (ZV) function that supports standard ZV Port in-
terface timing. Signals available include VSYNC,
CHSYNC, PCLK and 16-bit data bus: Y[7:0] and
UV[7:0]. The rising edge of PCLK clocks data into the
ZV port. See Figure 2, Zoom Video Port Timing below.
14 May 1999
Version 1.11
5
5 Page 
OMNIVISION TECHNOLOGIES, Inc.
OV6620/OV6120
Advanced Information
Preliminary
SINGLE IC CMOS COLOR AND B/W DIGITAL CAMERAS
PCLK
HREF
Y[7:0]
UV[7:0]
PCLK
HREF
Y[7:0]
Tclk
Tsu Thd
10 G
R
10 B
G
repeat for all data bytes
Pixel Data 16-bit Timing
PCLK rising edge latches data bus
Tclk
10
10
Tsu Thd
10 10 B G
BG
10 10
repeat for all data bytes
Pixel Data 8-bit Timing
PCLK rising edge latches data bus
Note: Tclk is pixel clock period. When the OV6620 system clock is 17.73MHz, Tclk = 112ns for 16-bit
output; Tclk = 56ns for 8-bit output. Tsu is HREF set-up time, maximum is 15 ns; Thd is HREF hold time,
maximum is 15 ns.
Figure 4. Pixel Data Bus (RGB Output)
14 May 1999
Version 1.11
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet OV6120.PDF ] | |
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