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PDF LC82102W Data sheet ( Hoja de datos )
| Número de pieza | LC82102W | |
| Descripción | Image-Processing LSI for Fax/ Copier and OCR Products | |
| Fabricantes | Sanyo Semicon Device | |
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Ordering number : EN*5155
Preliminary
CMOS LSI
LC82102, LC82102W
Image-Processing LSI
for Fax, Copier and OCR Products
Overview
The LC82102 and LC82102W convert analog video
signals from CCD or contact image sensors to high-
quality binary video data. The LC82102/W converts the
input analog data to multi-valued data and uses two-
dimensional filtering and an error diffusion technique that
produces high-quality images to produce a two-valued
image. Finally, the LC82102 reduces the image in the
main and subsidiary scan directions. The LC82102
requires absolutely no external memory since it limits the
number of pixels processed to 2040 per line. This LSI can
implement the image processing used by FAX, copier and
OCR products.
Features
• Number of pixels processed: 2040 pixels/line
• Processing speed: 500 ns/pixel maximum (when the
CLKIN input frequency is 32 MHz)
• Built-in 8-bit A/D converter (includes a sensor signal
delay adjustment function)
• Built-in 6-bit D/A converter for setting the A/D
converter high reference potential
• Sensor drive circuit (supports CCD and all CIS types)
• Digital clamp (single-point clamp, even/odd clamp)
• Distortion correction (white correction: 8-pixel
averaging correction, black correction: black correction
subtraction data setting)
• Gamma correction (supports user-defined curves)
• Simple binary-conversion processing (fixed threshold
level, density-adaptive threshold level)
• Intermediate processing error diffusion (64 levels)
• Image reduction (thinning, fine black line retaining, fine
white line retaining)
• Single-voltage 5 V supply and low power due to CMOS
process fabrication
Package Dimensions
unit: mm
3159-QFP64E
[LC82102]
unit: mm
3190-SQFP64
[LC82102W]
SANYO: QIP64E
SANYO: SQFP64
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
91195HA (OT) No. 5155-1/5
1 page  
Sample Application
LC82102, LC82102W
1. C1: Use a 0.01 µF laminated ceramic capacitor.
2. Set up the polarity of the image signal from the sensor so that white data is represented by the highest potential and
black data by the lowest potential. A level conversion circuit can allow the whole dynamic range of the built-in A/D
converter to be used effectively if the maximum output level of the peaks in the image signal from the sensor does
not reach 4.2 V.
3. Although AGND and DGND are completely isolated internally in this LSI, AVDD and DVDD are connected through
the substrate. Therefore, the power supply system must be designed so that no potential difference between AVDD
and DVDD can occur. Also, when power is applied or removed, the time lag between the power supplies must be
under 3 ms.
s No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace
equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of
which may directly or indirectly cause injury, death or property loss.
s Anyone purchasing any products described or contained herein for an above-mentioned use shall:
Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and
distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all
damages, cost and expenses associated with such use:
Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on
SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees
jointly or severally.
s Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for
volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied
regarding its use or any infringements of intellectual property rights or other rights of third parties.
This catalog provides information as of September, 1995. Specifications and information herein are subject to
change without notice.
PS No. 5155-5/5
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet LC82102W.PDF ] | |
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