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| Ordering number : EN*5685 COMS IC LC82104 Color Image Processing IC for Fax and Scanner Applications Preliminary 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 highquality 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. * 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. Features * Number of pixels processed: 2700 pixels x 3 lines (Both bright and dark correction applied to all pixels) 5400 pixels x 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 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 LC82104 Specifications Absolute Maximum Ratings at Ta = 25C, 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 Hand soldering: 3 seconds Reflow soldering: 10 seconds Ta 70 C Conditions Ratings -0.3 to +7.0 -0.3 to VDD + 0.3 400 -30 to +70 -55 to +125 350 235 Unit V V mW C C C C Allowable Operating Ranges at Ta = -30 to +70C, GND = 0 V Parameter Supply voltage Input voltage Symbol VDD VIN Conditions Ratings min 4.75 0 typ max 5.25 VDD Unit V V Electrical Characteristics at Ta = -30 to +70C, GND = 0 V, VDD = 4.75 to 5.25 V Parameter Input high-level voltage Input low-level voltage Input leakage current Output high-level voltage Output low-level voltage Output leakage current Symbol VIH VIL II VOH VOL IOZ VIN = VDD, VSS IOH = -3 mA IOL = 3 mA At high-impedance -10 -10 2.4 0.4 +10 Conditions Ratings min 2.2 0.8 +10 typ max Unit V V A V V A Analog Characteristics Parameter [D/A Converter] Resolution [A/D Converter] When the low reference potential = 1.0 V, and the high reference potential = 3.0 V Resolution Linearity error Differential linearity error 8 1 1 bit LSB LSB 6 bit Symbol Conditions Ratings min typ max Unit No. 5685-2/6 LC82104 Block Diagram Digital CDS Shading correction Gamma correc -tion Color balance (gain control) Multi-valued resolution conversion Image data interface 6 kbit SRAM Simple bi-coding Error diffusion DRAM Controller interface Controller interface signals Pin Assignment Top view No. 5685-3/6 LC82104 Pin Functions typ I O Input Output B P Bidirection Power NC Not connected Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 Pin DVDD D7 D6 D5 D4 D3 D2 D1 D0 DGND DVDD A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 CS RD WR REF TRIG RESET SCK7 SCK6 SCK5 SCK4 SCK3 SCK2 SCK1 DGND CLKIN DGND DVDD FSAMP SSAMP AGND AVDD ATAPH ATAPM AGND ATAPL CTAP I/O P B B B B B B B B P P I I I I I I I I I I I I I I I I I I I O O O O O O O P I P P O O P P O O P O O Digital system ground System clock input Digital system ground Digital system power supply Sensor driver signal outputs CPU interface chip select CPU interface read signal CPU interface write signal DRAM refresh signal input External read signal input System reset CPU interface address bus A12 is the MSB, A0 is the LSB. Digital system ground Digital system power supply CPU interface data bus D7 is the MSB, D0 is the LSB. Digital system power supply Function Floating data sampling point monitor signal output Signal data sampling point monitor signal output Analog system ground Analog system power supply A/D converter high-level reference analog output A/D converter mid-level reference analog output Analog system ground A/D converter low-level reference analog output Analog clamp analog output Continued on next page. No. 5685-4/6 LC82104 Continued from preceding page. Pin No. 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 Pin GIN RIN BIN ATEST AVDD AGND DVDD DGND DA15/GOE DA14/ROE DA13/BOE DA12 DA11 DA10 DA9 DGND DA8 DA7 DA6 DA5 DA4 DA3 DA2 DA1 DA0 DGND DVDD RAS CAS0 CAS1/MWR1 MWR0 MRD IOWR CLAMP/LININT NC NC PD7/SD PD6/SDCK DVDD DGND PD5/SDE PD4/PP4 PD3/PP3 PD2/PP2 PD1/PP1 PD0/PP0 PDCK/DACK/PP5 PDE/DREQ/PP6 MTP/PP7 DGND I/O I I I O P P P P O O O O O O O P O O O O O O O O O P P O O O O O O O NC NC O O P P O B B B B B B B B P Parallel data transfer clock/DMA data acknowledge signal input/general-purpose I/O port Parallel data output valid period signal/DMA data request signal output/general-purpose I/O port Motor drive timing signal output/General-purpose I/O port Digital system ground DMA outputs/general-purpose I/O ports DMA output/serial data output DMA output/serial data transfer clock Digital system power supply Digital system ground DMA output/Serial data output valid period signal output Digital system ground Digital system power supply External memory RAS signal output External memory CAS signal output External memory CAS0 signal output/External memory MWR1 signal External memory MWR0 signal output External memory MRD signal output I/O write signal output Clamp point monitor signal output/Line signal output External memory address signal outputs DA15 is the MSB, DA0 is the LSB. Digital system ground External memory address signal outputs DA15 is the MSB, DA0 is the LSB. Green sensor signal input Red sensor signal input Blue sensor signal input Analog test output (Normally left open.) Analog system power supply Analog system ground Digital system power supply Digital system ground /Green data valid period signal /Red data valid period signal /Blue data valid period signal Function No. 5685-5/6 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 |
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