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PDF LC82101 Data sheet ( Hoja de datos )
| Número de pieza | LC82101 | |
| Descripción | Image Processing Circuit for FAX/ Copier/ and OCR Products | |
| Fabricantes | Sanyo Semicon Device | |
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Ordering number : EN*4982A
Preliminary
CMOS LSI
LC82101
Image Processing Circuit
for FAX, Copier, and OCR Products
Overview
The LC82101 converts an analog image signal from a
CCD or contact sensor to high-quality binary image data.
The LC82101 uses an internal 8-bit A/D converter for
A/D conversion, and in addition to the orthodox dithering
technique, also supports an error diffusion technique that
allows an even higher quality image to be acquired. These
techniques apply to the whole range of processing
supported by the LC82101, including full-pixel distortion
correction, gamma conversion for arbitrary gamma
curves, image compression processing, two-dimensional
filtering, halftone processing, and image separation
processing to separate documents into text, photograph,
and halftone regions. Thus this LSI implements the image
processing required by FAX, copier, and OCR systems.
Features
• Number of pixels processed
2048 pixels/line (64 KB memory, white correction only)
4096 pixels/line (256 KB memory, both white and black
correction)
8192 pixels/line (256 KB memory, white correction
only)
• Processing speed
500 ns/pixel maximum (The processing time for 1 pixel
is 16/SYSCLK.)
• Supports medium speed products with a single external
memory chip
100 ns access time memory allows 800 ns/pixel
processing, and 60 ns access time memory allows
500 ns/pixel processing.
• AGC (The A/D converter high-level reference voltage is
varied from 1.2 to 4.2 V in 0.2 V steps.)
• Built-in 8-bit A/D converter (includes a sensor signal
delay adjustment function)
• Sensor drive circuit (supports CCD and all CIS types)
• Digital clamp (single-point clamp, even/odd clamp)
• Distortion correction (white correction, black correction,
full-pixel correction)
• Gamma correction (supports user-defined curves)
• Image area separation (text, photographs, halftone)
• Simple binary-conversion processing (fixed threshold
level, density-adaptive threshold level)
• Halftone processing
Structural dithering (64 levels), settable dithering
threshold level
Error diffusion technique (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
3174-QFP80E
[LC82101]
SANYO: QIP80E
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
63095HA (OT) No. 4982-1/5
1 page  
LC82101
Specifications
Absolute Maximum Ratings at Ta = 25°C, GND = 0 V
Parameter
Maximum supply voltage
I/O voltages
Allowable power dissipation
Operating temperature
Storage temperature
Soldering conditions
Symbol
VDD max
VI, VO
Pd max
Topr
Tstg
Conditions
Ta ≤ 70°C
Hand soldering: 3 seconds
Reflow soldering: 10 seconds
Ratings
–0.3 to +7.0
–0.3 to VDD + 0.3
450
–30 to +70
–55 to +125
350
235
Unit
V
V
mW
°C
°C
°C
°C
Allowable Operating Conditions at Ta = –30 to +70°C, GND = 0 V
Parameter
Supply voltage
Input voltage
Symbol
VDD
VIN
Conditions
min typ max Unit
4.5 5.5 V
0
VDD
V
DC Characteristics at Ta = –30 to +70°C, GND = 0 V, VDD = 4.5 to 5.5 V
Parameter
Input high-level voltage
Input low-level voltage
Input leakage current
Output high-level voltage
Output low-level voltage
Output leakage current
Current drain
Symbol
VIH
VIL
IL
VOH
VOL
IL
IDD
Conditions
VIN = VDD, VSS
IOH = 3 mA
IOL = 3 mA
When in the high-impedance state
VDD = 5.0 V, SYSCLK = 32 MHz
min
2.2
–25
2.4
–100
typ max Unit
V
0.8 V
+25 µA
V
0.4 V
+100
µA
40 60 mA
Analog Characteristics
The minimum signal level in analog input signals must be matched to AGND, and the maximum signal level must
not exceed the maximum AGC potential.
Parameter
Symbol
Conditions
[When AGND = 0 V]
Maximum potential
Minimum potential
[When AVDD = 5.0 V, AGND = 0 V, and the AGC is at the maximum potential]
Resolution
Linearity error
Differential linearity error
min typ max Unit
0.82
0.22
0.84
0.24
0.86
0.26
AVDD V
AVDD V
8 bit
±1 LSB
±1 LSB
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 June, 1995. Specifications and information herein are subject to change
without notice.
PS No. 4982-5/5
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet LC82101.PDF ] | |
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