LC82104 データシート ( Color Image Processing IC for Fax and Scanner Applications )

部品番号

LC82104

部品説明

Color Image Processing IC for Fax and Scanner Applications

メーカ

Sanyo Semicon Device

ロゴ

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Ordering number : EN*5685

Preliminary

COMS IC

LC82104

Color Image Processing IC for Fax

and Scanner Applications

Overview

The LC82104 converts analog image signals from a CCD

and contact image sensor to precise multi-valued image

data using a built-in 8-bit A/D converter and internal

image-processing functions. The LC82104 includes a 6-bit

reference potential setting D/A converter for the 8-bit A/D

converter and CDS function, and produces high-quality

multi-valued data by performing shading correction for all

pixels, color balance adjustment, and gamma conversion

with support for arbitrary gamma curves. It also includes a

multi-value data resolution conversion function, and thus

can support input from and output to systems with

different resolutions. Furthermore, it can perform high-

quality conversion to two-valued images from the green

signal. The LC82104 can process up to 5400 pixels by

three lines and requires no external memory whatsoever

for use in distortion correction and other processing. Thus

this IC can implement the image processing required for

color scanners, FAX, copiers, OCRs and similar

applications.

Features

• Number of pixels processed:

2700 pixels × 3 lines

(Both bright and dark correction applied to all pixels)

5400 pixels × 3 lines

(Only bright correction applied to all pixels)

• Processing speed:

1,200 ns/pixel maximum (3-color CCD) (When CLKIN

is 20 MHz)

400 ns/pixel maximum (CIS and black-and-white CCD)

(When CLKIN is 20 MHz)

• 8-bit A/D converter

(Includes a sensor signal timing adjustment function.)

• 6-bit D/A converter for setting the A/D converter

reference potential

• Sensor drive circuit

(Supports all types of CCD and CIS sensors)

• Digital CDS (Correlated double sampling)

• Digital clamp circuit

(Single-point clamping, even field clamping)

• Shading correction

(Bright correction: all-pixel correction, dark correction:

either all-pixel correction or set dark correction

attenuation data)

• Gamma correction

(Supports user-defined curves for each of R, G, and B

using 8-bit data)

• Color balance (Gain control)

• Main scan direction multi-value resolution conversion

(From 2/1 to 1/2, in units of 1/256)

• Binary coding

(Simple binary coding (slicing), and 64-level error

diffusion)

*: The green signal is converted to a binary signal.

• Memory manager

(Image data buffer memory controller)

• Fabricated in a CMOS process for 5-V single-voltage

power supply operation.

Package Dimensions

unit: mm

3181B-SQFP100

[LC82104]

SANYO: SQFP100

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

30698RM(OT) No. 5685-1/6

1 Page

Block Diagram

Pin Assignment

LC82104

Digital

CDS

Shading

correction

Gamma

correc

-tion

Color balance

(gain control)

Multi-valued

resolution

conversion

6 kbit

SRAM

Simple

bi-coding

Error

diffusion

Image data

interface

DRAM

Controller

interface

Controller

interface signals

Top view

No. 5685-3/6

3Pages

LC82104

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 March, 1998. Specifications and information herein are subject to

change without notice.

PS No. 5685-6/6

6 Page

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部品番号	部品説明	メーカ
LC82101	Image Processing Circuit for FAX/ Copier/ and OCR Products	Sanyo Semicon Device
LC82102	Image-Processing LSI for Fax/ Copier and OCR Products	Sanyo Semicon Device
LC82102W	Image-Processing LSI for Fax/ Copier and OCR Products	Sanyo Semicon Device
LC82103	Image-Processing LSI for Facsimile/ Copier/ and OCR Applications	Sanyo Semicon Device

LC82104 の電気的特性と機能

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