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WT8871-C Datasheet Preview

WT8871-C Datasheet

Video Display Controller

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Weltrend Semiconductor, Inc.
WT8871-C/8871-E
Video Display Controller for
Analog Small Size LCD Display System
Data Sheet
Rev. 0.97
May 26, 2006
Copyright Notice
This data sheet is copyrighted by Weltrend Semiconductor, Inc. Do not reproduce, transform to any other format,
or send/transmit any part of this documentation without the express written permission of Weltrend Semiconductor,
Inc.
Disclaimers
Right to make change
This document provides technical information for user. Weltrend Semiconductor, Inc. reserves the right to make
change without further notice to any products herein.
2F, No. 24, Industry E. 9th RD., Science-Based Industrial Park, Hsin-Chu, Taiwan
TEL: 886-3-5780241
http://www.weltrend.com.tw




Weltrend

WT8871-C Datasheet Preview

WT8871-C Datasheet

Video Display Controller

No Preview Available !

WT8871-C/WT8871-E
Video Display Controller for Analog
Small Size LCD Display System
Table of Contents
1. GENERAL DESCRIPTION ....................................................................................................................... - 5 -
1.1. FEATURES .....................................................................................................................................................- 5 -
1.2. APPLICATION ................................................................................................................................................- 6 -
1.3.SELECTION GUIDE..........................................................................................................................................- 6 -
1.4. BLOCK DIAGRAM..........................................................................................................................................- 7 -
1.5. APPLICATION EXAMPLE ................................................................................................................................- 8 -
2. PACKAGE TYPE AND PIN DESCRIPTION.......................................................................................... - 9 -
2.1. PIN CONFIGURATION.....................................................................................................................................- 9 -
2.2 PIN DESCRIPTION .........................................................................................................................................- 10 -
3. FUNCTION DESCRIPTION.................................................................................................................... - 13 -
3.1. MCU...........................................................................................................................................................- 13 -
3.2. VIDEO DECODER.........................................................................................................................................- 13 -
3.2.1. Video Input Crossbar......................................................................................................................... - 13 -
3.2.2. CVBS output....................................................................................................................................... - 13 -
3.2.3. SOG Input .......................................................................................................................................... - 13 -
3.2.4. Adaptive Comb Filter......................................................................................................................... - 13 -
3.2.5. Chroma Peaking ................................................................................................................................ - 13 -
3.2.6. Luma peaking..................................................................................................................................... - 14 -
3.2.7. Luma enhancement ............................................................................................................................ - 14 -
3.2.8. Auto Mode Detection ......................................................................................................................... - 14 -
3.3. INPUT PROCESSOR.......................................................................................................................................- 15 -
3.3.1. ITU-BT.656 Interface......................................................................................................................... - 15 -
3.3.2. Reference Timing Generation ............................................................................................................ - 15 -
3.3.3. Resolution Detect ............................................................................................................................... - 16 -
3.3.4. Active Video Region Detect................................................................................................................ - 17 -
3.3.5. Auto White Balance............................................................................................................................ - 17 -
3.4. SCALER .......................................................................................................................................................- 18 -
3.5. LUMINANCE AND CHROMINANCE ADJUSTMENT .........................................................................................- 18 -
3.5.1. Hue..................................................................................................................................................... - 19 -
3.5.2. Saturation........................................................................................................................................... - 19 -
3.5.3. Contrast.............................................................................................................................................. - 19 -
3.5.4. Sharpness ........................................................................................................................................... - 19 -
3.5.5. Brightness .......................................................................................................................................... - 19 -
3.5.6. Color Space Conversion .................................................................................................................... - 19 -
3.6. ON SCREEN DISPLAY (OSD).......................................................................................................................- 20 -
3.6.1. Character Attribute ............................................................................................................................ - 20 -
3.6.2. Display RAM...................................................................................................................................... - 20 -
3.6.3. User-Defined Font RAM .................................................................................................................... - 21 -
3.6.4. Color Look-Up Table (CLUT) ........................................................................................................... - 22 -
3.6.5. Background Windows ........................................................................................................................ - 23 -
3.6.6. Fade in/out function ........................................................................................................................... - 23 -
3.6.7. External OSD ..................................................................................................................................... - 23 -
3.7. GAMMA CORRECTION .................................................................................................................................- 23 -
3.8. DITHER .......................................................................................................................................................- 23 -
3.9. TCON AND PANEL CLOCK..........................................................................................................................- 24 -
3.10. DIGITAL-TO-ANALOG CONVERTER ...........................................................................................................- 25 -
3.11. VCOM OUTPUT ........................................................................................................................................- 25 -
3.12. SPREAD SPECTRUM PLL ...........................................................................................................................- 25 -
3.13. KEYPAD ADC ...........................................................................................................................................- 25 -
3.14. PWM ........................................................................................................................................................- 26 -
3.14.1. PWM ................................................................................................................................................ - 26 -
Copyright2006 Weltrend Semiconductor, Inc. All Rights Reserved.
Weltrend reserves right to modify all information contained in this document without notice.
-2-


Part Number WT8871-C
Description Video Display Controller
Maker Weltrend
Total Page 30 Pages
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