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PDF LC82103 Data sheet ( Hoja de datos )
| Número de pieza | LC82103 | |
| Descripción | Image-Processing LSI for Facsimile/ Copier/ and OCR Applications | |
| Fabricantes | Sanyo Semicon Device | |
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Ordering number : EN*5402
Preliminaly
CMOS LSI
LC82103
Image-Processing LSI for Facsimile, Copier,
and OCR Applications
Overview
The LC82103 converts the analog video signal from the
CCD contact image sensor into high-precision binary
image data. The LC82103 includes an 8-bit A/D converter
and two 6-bit D/A converters. The 6-bit D/A converters
are used for setting reference potential (high and low) of
the 8-bit A/D converter. The LC82103 converts the input
analog data to high precision multilevel data, that is
produced by all pixel shading correction process, multi-
level image resolution converting process, and γ
correction process of user defined curves. That multilevel
data is converted to high-precision bi-level image that is
produced by using two dimensional filtering, a image
separation method, and an error diffusion technique.
Finally the LC82103 is able to reduce the image in the
horizontal and vertical directions, too. The LC82103
requires absolutely no external memory since it limits the
number of pixels processed to 3072/line. This LSI can
implement the image processing used by FAX, copier, and
OCR applications.
Features
• Number of pixels processed: 3072 pixels/line
• Processing speed: 250 ns/pixel maximum (When
CLKIN = 32 MHz)
• Built-in 8-bit A/D converter (with a sensor signal timing
adjustment function)
• Built-in two 6-bit D/A converters for setting the A/D
converter high and low reference potential
• Sensor drive circuit (supports CCDs and several CIS
types)
• Digital clamping (single-point clamping, even/odd
clamping)
• Distortion correction (white correction: all pixels, black
correction: settable black correction subtracted data)
• γ correction (support user-defined curves: 8-bit data)
• Image area separation (characters, photographs,
screened halftone areas)
• Simple binary coding process (fixed threshold,
brightness adaptive threshold)
• Intermediate processing error diffusion (64 levels)
• Multilevel image resolution conversion (1/2, 2/3, 3/2,
2/1)
• Binary image reduction (horizontal: thinning, fine black
line retaining, fine white line retaining, vertical:
thinning, fine black line retaining)
• Single-voltage 5 V supply and low power due to CMOS
process fabrication
Package Dimensions
unit: mm
3159-QFP64E
[LC82103]
SANYO: QFP64E
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
63096HA (OT) No. 5402-1/5
1 page  
Application Example
LC82103
1. C1 is a 0.01 µF laminated ceramic capacitor
2. The video signal from the image sensor must be set up with a polarity that has white data being the highest potential
and black data being the lowest. If the peak level of the video signal from the image sensor does not reach a
maximum value of 4.2 V, a level conversion circuit should be inserted to allow the full dynamic range of the A/D
converter to be taken advantage of.
3. Although AGND and DGND are fully isolated within the LSI, AVDD and DVDD are connected through the LSI
substrate. Accordingly, AVDD and DVDD must be set up so that there is no potential difference between them. Also,
the time lag between these signals must be under 3 ms when power is first applied or when power is turned off.
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 December, 1997. Specifications and information herein are subject to
change without notice.
No. 5402-5/5
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet LC82103.PDF ] | |
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