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PDF OV7410 Data sheet ( Hoja de datos )
| Número de pieza | OV7410 | |
| Descripción | SINGLE-CHIP CMOS B&W NTSC CAMERA | |
| Fabricantes | OmniVision Technologies | |
| Logotipo |  |
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OV7910/OV7410/OV7411
OV7910 SINGLE-CHIP CMOS COLOR NTSC CAMERA
OV7410/OV7411 SINGLE-CHIP CMOS B&W NTSC CAMERA
Features
n Single-chip 1/3 inch format video camera
— High-sensitivity version (OV7411)
n Composite video: NTSC or S-Video
n Component video: RGB or YUV
n Sensitivity boost (+18 dB) /AGC on-off
n Automatic exposure/gain/white balance
n External frame sync capability
n Aperture correction
n SCCB programmable:
— color sat., brightness, contrast, white balance, exposure time,
gain
n Gamma correction (0.45)-On/Off
n Low power consumption
n +5 volt-only power supply
General Description
The OV7910 (color) and OV7410/OV7411 (black and white) Single-
chip CMOS camera devices are designed to provide a high level of
functionality in a single small-footprint package. All three devices
support NTSC composite video and S-Video. The OV7910 imager
also provides RGB and YCrCb video signals, and each device
directly interfaces with a VCR TV monitor or other 75 ohm terminated
input. A minimum of external components are required to complete a
fully functional camera subsystem. The OV7910/OV7410/OV7411
video cameras require only a single 5-volt DC supply and have been
designed for very low power operation. These products are ideal for
all applications requiring a small footprint, low voltage, low power and
low cost color or black and white video camera.
n Video Conferencing
n Video Phones
n Video e-mail
n PC Multimedia
n Toys
n Security
n Surveillance
AVDD 7
RGSW 8
CEXP 9
HSAT 10*
RGAMMA 11*
SMTawb 12*
EVDD 13*
EGND 14*
BUCO 15
GYYO 16
RVCVO 17
OVDD 18
OV7910/OV7410/OV7411
42 DEGND
41 DEVDD
40 HSHP
39 AMOD1
38 AMOD0
37 PWDN
36 FSI
35 Reserved
34 FODD/SBB
33 FSO/VSFR
32 VSHYNC/MIR
31 VADPXO
* NOTE: These pins are “no connect” in OV7410/OV7411 sensor.
OV7910/OV7410/OV7411 PIN ASSIGNMENT
Array Size
NTSC: 510 x 492 pixels
Image Area
NTSC: 4.69 x 3.54 mm
Auto Electronic
Exposure
Min. Illumination
(3000K)
S/N Ratio
Fixed Pattern
Noise (FPN)
Dark Current
Dynamic Range
Power Supply
Power
Requirements
Package Type
1/60 - 1/15000 sec.
OV7910: < 3 lux @ f1.2
OV7410: < 0.5 lux @ f1.2
OV7411: < 0.2 lux @ f1.2
> 48 dB
< 0.03% VP-P
< 0.2 nA/cm2
> 72 dB
5VDC, ±5%
200 mW
48-pin LCC
OmniVision Technologies, Inc. 930 Thompson Place Sunnyvale, CA 94086 U.S.A.
Tel: (408) 733-3030 Fax: (408) 733-3061
e-mail: [email protected]
Website: http://www.ovt.com
Version 2.3, 13 May 2000
1 page  
OMNIVISION TECHNOLOGIES, Inc.
OV7910/OV7410/OV7411
SINGLE IC CMOS COLOR & B/W NTSC ANALOG CAMERAS
1. Functional Description
(Note: All references to color functions apply only to OV7910 image sensor)
1.1 Video Standards
Two TV standards are implemented and available as
output in the OV7910/OV7410/OV7411 imaging
devices: NTSC (M). Table 2 below shows how to con-
figure the standard of choice. Please note
that the accuracy and stability of the crystal clock fre-
quency is important to avoid unwanted color shift in TV/
video systems.
Table 2. Standard Configuration
Standard
(pin 24)
Clock
Comments
NTSC
0
14.31818MHz
clock in = 4 x Fsc
1.2 Video Formats
The OV7910/OV7410/OV7411 image sensors support a variety of formats including Composite (CVBS), S-Video
(YO/CO), RGB components, YUV components, and B/W. Composite and S-Video signals are generated from the
internal TV encoder and the RGB/YUV/BW outputs are generated from the color matrix prior to entering the
encoder. The image sensor utilizes the RG/BG Bayer pattern sending raw pixel data through the color matrix, cre-
ating RGB or YUV component signals. At the same time, YUV signals are also processed to generate both com-
posite and S-Video signals. (Note: Color format configuration is valid only for the OV7910 image sensor)
1.2.1 Composite and S-Video
The Composite/S-Video format is the power-up default configuration for the OV7910/OV7410/OV7411 image sen-
sors. Pins AMOD0/AMOD1 (pins 38 and 39) select composite and S-Video formats. In this configuration, RVCVO
(pin 17) outputs CVBS, GYYO (pin 16) outputs the YO component of the S-Video signal, and BUCO (pin 15) out-
puts the CO component. Table 3 below summarizes the formats available and the settings required on the appro-
priate pins.
1.2.2 RGB
Setting AMOD0 = 1 (w/AMOD1 = x) selects the RGB format. In this configuration, RVCVO outputs the Red compo-
nent, GYYO outputs the Green component, and BUCO provides the Blue component.
1.2.3 YUV
Setting AMOD0=0 and AMOD1=1 configures the OV7910/OV7410/OV7411 sensors to operate in YUV or B/W
mode. In this configuration, GYYO outputs the Y component, RVCVO provides the Cr component,
and BUCO outputs the Cb component. On the OV7410 image sensor, only the GYYO (Y component) output is
valid.
13 May 2000
Version 2.3
5
5 Page 
OMNIVISION TECHNOLOGIES, Inc.
OV7910/OV7410/OV7411
SINGLE IC CMOS COLOR & B/W NTSC ANALOG CAMERAS
2. SCCB Bus
Many of the functions and configuration registers in the
OV7910/OV7410/OV7411 image sensors are available
through the SCCB high-speed serial interface. The
SCCB port is enabled by asserting the SBB line (pin
34) through a 10K ohm resistor to VDD. When the
SCCB capability is enabled (SBB = 1),the OV7910/
OV7410/OV7411 imager operates as a slave device
that supports up to 400 kbps serial transfer rate using a
7-bit address/data transfer protocol Within each byte,
MSB is always transferred first. Read/write control bit is
the LSB of the first byte. The protocol requires that
SIO-0 remain stable during the HIGH period of the
clock, SIO-1. Each bit is allowed to change state only when SIO-1 is LOW.
2.1 SCCB Bus Protocol Format
In SCCB operation, the master must perform the following operations:
n Generate the start/stop condition
n Provide the serial clock on SIO-1
n Place the 7-bit slave address, the RW bit, and the 8-bit subaddress on SIO-0
The receiver must pull down SIO-0 during the acknowledge bit time. During the write cycle, the OV7910/OV7410/
OV7411 device returns the acknowledgment and, during read cycle, the master returns the acknowledgment
except when the read data is the last byte. If the read data is the last byte, the master does not perform an
acknowledge, indicating to the slave that the read cycle can be terminated.
Within each byte, MSB is always transferred first. Read/write control bit is the LSB of the first byte. The protocol
requires that SIO-0 remain stable during the HIGH period of the clock, SIO-1. Each bit is allowed to change state
only when SIO-1 is LOW
The OV7910/OV7410/OV7411 SCCB supports multi-byte write and multi-byte read. The master must supply the
subaddress. in the write cycle, but not in the read cycle. Therefore, the OV7910/OV7410/OV7411 takes the read
subaddress from the previous write cycle. In multi-byte write or multi-byte read cycles, the subaddress is automati-
cally increment after the first data byte so that continuous locations can be accessed in one bus cycle. A multi-byte
cycle overwrites its original subaddress; therefore, if a read cycle immediately follows a multi-byte cycle, you must
insert a single-byte write cycle that provides a new subaddress.
The OV7910/OV7410/OV7411 supports a single slave ID. The ID is preset to 80 write and 81 for read.
In the write cycle, the second byte in SCCB bus is the subaddress for selecting the individual on-chip registers, and
the third byte is the data associated with this register. Writing to an undefined subaddress is ignored.
In the read cycle, the second byte is the data associated with the previous stored subaddress. Reading of unde-
fined subaddresses returns unknown data.
13 May 2000
Version 2.3
11
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet OV7410.PDF ] | |
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