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VL6522 Datasheet

  • VL6522

  • VGA resolution USB2.0 web camera sensor

  • 277.97KB

  • 35頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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VL6522
VGA resolution USB2.0 web camera sensor
Preliminary Data
Features
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Description
The VL6522 is a VGA imager on chip (IOC),
fabricated in a high performance 0.18 碌m CMOS
imaging process. The device produces a YUV
4:2:2 digital video data stream at up to 60
(a)
frames per second, and supports a microphone
input.
Video and audio data is output via a USB2.0 high
speed (480 Mbps) interface and allows simple
interfacing to a host PC using generic audio and
video class drivers under the appropriate
operating system (Windows XP). Audio/video
class compliance and vendor command sets
allow development of other O/S drivers with
relative ease.
Figure 1.
Audio
pre-amplifier
+
ADC
audio
data
640 x 480 (VGA) USB2.0 Web camera
RGB Bayer color filter array
3.6 碌m pixel size
Integrated 10-bit video ADC and processing
16-bit audio pre-amplifier,
危
-
螖
ADC and
processing
USB2.0 high speed interface for data transfer
and control
I
2
C master capability
USB audio class type 1 compliance
USB video YUV2 compliance
On-chip 3.3 V and 1.8 V regulators
Requires single 5 V supply
Minimum required PCB support components
Video format: 640 x 480 YUV2 up to 30 fps
Single 12 MHz input clock
Integrated image processing functions:
鈥?Automatic exposure
鈥?Automatic white balance
鈥?Dark level compensation
鈥?Lens shading correction
鈥?Image sub-sampling
鈥?Flicker cancellation
鈥?Sharpening
鈥?Gamma correction
鈥?RGB to YUV 422
Audio processing:
鈥?Audio class compliance PCM16
鈥?Preamplifier + ADC + processing
鈥?Audio rates of 8 kHz to 48 kHz, 16 bits
鈥?Audio dynamic range from mic. input to
USB data output > 60 dB
Functional block diagram
VGA pixel array
+
ADC readout
pixel video
data
Power
management
OSC, PLL
USB2
interface
Digital processing
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a. 60 fps max at QVGA resolution, 30 fps max at VGA
resolution
July 2007
Rev 2
1/35
www.st.com
35
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.

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