Datasheet LC82103 Datasheet (SANYO)

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, multi­level 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

CMOS LSI

63096HA (OT) No. 5402-1/5

Preliminaly

SANYO: QFP64E

[LC82103]

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

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

Image-Processing LSI for Facsimile, Copier,

and OCR Applications

LC82103

Ordering number : EN*5402

No. 5402-2/5

LC82103

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage V

DD

max –0.3 to +7.0 V

Maximum input and output voltages V

I

, VOmax –0.3 to VDD+ 0.3 V
Allowable power dissipation Pd max Ta ≤ 70°C 350 mW
Operating temperature Topr –30 to +70 °C
Storage temperature Tstg –55 to +125 °C

Soldering temperature endurance

Hand soldering: 3 seconds 350 °C
Reflow soldering: 10 seconds 235 °C

Specifications

Absolute Maximum Ratings at Ta = 25°C, GND = 0 V

Parameter Symbol Conditions

Ratings

Unit

min typ max

Supply voltage V

DD

4.5 5.5 V

Input voltage V

IN

0 V

DD

V

Allowable Operating Ranges at Ta = –30 to +70°C, GND = 0 V

Parameter Symbol Conditions

Ratings

Unit

min typ max

Input high-level voltage V

IH

2.2 V

Input low-level voltage V

IL

0.8 V

Input leakage current I

IH, LVIN

= VDD, V

SS

–10 +10 µA

Output high-level voltage V

OHIOH

= –3 mA 2.4 V

Output low-level voltage V

OLIOL

= 3 mA 0.4 V

Output leakage current I

OZ

At high impedance –10 +10 µA

Current drain I

DD

CLKIN = 32 MHz 40 70 mA

DC Characteristics at Ta = –30 to +70°C, GND = 0 V, VDD= 4.5 to 5.5 V

Parameter Symbol Conditions min typ max Unit
[D/A Converter]
Resolution 6 bit
Internal resistance 4.8 kΩ
[A/D Converter] When the ATAPL potential = 0.8 V, ATAPH potential = 4.2 V
Resolution 8 bit
Linearity error ±1 LSB
Differential linearity error ±1 LSB
Internal resistance 330 Ω

Analog Characteristics

Block Diagram

Pin Functions

No. 5402-3/5

LC82103

Pin No. Symbol I/O Function

1 D7 B
2 D6 B
3 D5 B
4 D4 B

CPU interface data bus

5 D3 B

D7 is the MSB, and D0 is the LSB

.
6 D2 B
7 D1 B
8 D0 B
9 DGND P Digital system ground

10 DV

DD

P Digital system power supply
11 A8 I
12 A7 I
13 A6 I

CPU interface address bus

14 A5 I

A12 is the MSB, and A0 is the LSB.

15 A4 I
16 A3 I
17 DGND P Digital system ground
18 A2 I
19 A1 I CPU interface address bus
20 A0 I
21 WR I CPU interface write signal
22 RD I CPU interface read signal
23 A12 I CPU interface address bus
24 DV

DD

P Digital system power supply
25 CLKIN I System clock input
26 A11 I
27 A10 I CPU interface address bus
28 A9 I

Continued on next page.

Type: I: Input pin, O: Output pin, B: Bidirectional pin, P: Power supply pin, NC: No connection

No. 5402-4/5

LC82103

Continued from preceding page.

Pin No. Symbol I/O Function

29 CS I CPU interface chip select signal input
30 ICLK I External sampling point signal input
31 TRIG I External trigger signal input
32 RESET I System reset
33 SAMP/LININT O A/D converter sampling point monitor signal output/LINE signal output
34 TEST I Test pins (Must be connected to the digital system ground during normal operation.)
35 REF I DRAM refresh signal input
36 AGND P Analog system ground
37 DALRL I D/A converter low reference input for A/D converter low reference
38 DAHRL I D/A converter high reference input for A/D converter high reference
39 AIN I Sensor signal input
40 TEMP I Temperature signal input
41 ATAPH O Analog mid-level signal used as A/D converter high reference
42 DAHRH I D/A converter high reference input for A/D converter high reference
43 AV

DD

P Analog system power supply
44 DALRH I D/A converter high reference input for A/D converter low reference
45 ATAPL O Analog mid-level signal used as A/D converter low reference
46 AGND P Analog system ground
47 PD7/SD O DMA output/serial data output
48 PD6/SDCK O DMA output/serial data transfer clock
49 DGND P Digital system ground
50 PD5/SDE O DMA output/serial data output valid period indicator
51 PD4/PP4 B
52 PD3/PP3 B
53 PD2/PP2 B DMA output/general-purpose I/O ports
54 PD1/PP1 B
55 PD0/PP0 B
56 DV

DD

P Digital system power supply
57 DACK/PP5 B DMA data acknowledge signal input/general-purpose I/O port
58 DREQ/PP6 B DMA data request signal output/general-purpose I/O port
59 MTP/PP7 B Motor drive timing signal output/general-purpose I/O port
60 CLK2 O
61 CLK1 O

Sensor drive signal outputs

62 RS O
63 SH O
64 DGND P Digital system ground

No. 5402-5/5

LC82103

Application Example

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, AVDDand DVDDare connected through the LSI
substrate. Accordingly, AVDDand DVDDmust 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.

This catalog provides information as of December, 1997. Specifications and information herein are subject to
change without notice.

■ 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.

■ Anyone purchasing any products described or contained herein for an above-mentioned use shall:
➀ 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:

➁ 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.

■ 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.