PDF TW8811 Data sheet ( Hoja de datos )

Número de pieza	TW8811
Descripción	TFT Flat Panel Controller
Fabricantes	TECHWELL
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No Preview Available ! TW8811 -- TFT Flat Panel Controller with built-in 3D Video Decoder, TripleADCs, and PIP Support Preliminary Data Sheet from Techwell, Inc. Information may change without notice Disclaimer This document provides technical information for the user. Techwell Inc. reserves the right to modify the information in this document as necessary. The customer should make sure that they have the most recent data sheet version. Techwell Inc. holds no responsibility for any errors that may appear in this document. Customers should take appropriate action to ensure their use of the products does not infringe upon any patents. Techwell Inc. respects valid patent rights of third parties and does not infringe upon or assist others to infringe upon such rights. TECHWELL, INC. 1 REV C 02/07/2008 1 page TW8811 – TFT FLAT PANEL CONTROLLER − Built-in programmable timing controller On Screen Display − Supports dual window bitmapped OSD. − Built-in OSD controller with BitBlit Engine − Supports variety functions included like blinking, transparency and blending. − Supports External 16-bit OSD with external alpha blending control. − Support OSD compression Image Processing − Built-in 2D de-interlacing engine with proprietary low angle compensation circuit for smooth video rendering. − Built-in high quality scaler with nonlinear scaling support − Programmable hue, brightness, saturation, contrast − Sharpness control with vertical peaking up to +12db − Programmable color transient improvement control − Supports programmable cropping of input video and graphics. − Independent RGB gain and offset controls − Panorama / Water-glass scaling − DTV hue adjustment − Programmable 10-bit Gamma correction for each color − Operated in Frame Sync mode only − Black/White Stretch − Programmable favorite color enhancement PIP Function − PIP with variable sub window size − POP PRELIMINARY − Multiple PIP support − Built-in high quality down scaling engine for PIP SDRAM − Support 16bits Bus width SDRAM Host Interface − Supports 2-wire serial bus interface − Supports 8Bits Parallel Host Interface − Support DMA transfer Clock Generation − Frequency synthesizer with spread spectrum generate memory and display clocks − Spread spectrum profile based on triangular modulation with center spread − Modulation frequency and spread width can be selectable Power Management − Supports Panel power sequencing. − Supports DPMS for monitor power management. − 1.8 / 3.3 V operation Miscellaneous − Built-in single CCFL back light controller − Built-in single LED back light controller − Power-down mode − Single 27MHz crystal − 208-pin PQFP package TECHWELL, INC. 5 REV C 02/07/2008 5 Page TW8811 – TFT FLAT PANEL CONTROLLER PRELIMINARY oscillation of the color killer operation. This function can be disabled by programming a low threshold value. Automatic standard detection The TW8811 has build-in automatic standard discrimination circuitry. The circuit uses burst-phase, burst- frequency and frame rate to identify NTSC, PAL or SECAM color signals. The standards that can be identified are NTSC (M), NTSC (4.43), PAL (B, D, G, H, I), PAL (M), PAL (N), PAL (60) and SECAM (M). Each standard can be included or excluded in the standard recognition process by software control. The identified standard is indicated by the Standard Selection (SDT) register. Automatic standard detection can be overridden by software controlled standard selection. Video Format support TW8811 supports all common video formats as shown in Table 1. The video decoder needs to be programmed appropriately for each of the composite video input formats. Table 1. Video Input Formats Supported by the TW8811 Format NTSC-M NTSC-Japan (1) PAL-B, G, N PAL-D PAL-H PAL-I PAL-M PAL-CN SECAM Lines 525 525 625 625 625 625 525 625 625 Fields 60 60 50 50 50 50 60 50 50 PAL-60 NTSC (4.43) 525 60 525 60 Notes: (1). NTSC-Japan has 0 IRE setup. Fsc 3.58 MHz 3.58 MHz 4.43 MHz 4.43 MHz 4.43 MHz 4.43 MHz 3.58 MHz 3.58 MHz 4.406MHz 4.250MHz 4.43 MHz 4.43 MHz Country U.S., many others Japan Many China Belgium Great Britain, others Brazil Argentina France, Eastern Europe, Middle East, Russia China Transcoding Component Processing Luminance Processing The TW8811 decoder adjusts brightness by adding a programmable value (in register BRIGHTNESS) to the Y signal. It adjusts the picture contrast by changing the gain (in register CONTRAST) of the Y signal. The TW8811 decoder also provides a sharpness control function through a control register. The center frequency of the peaking filter is selectable. A coring function is provided along with the sharpness control to reduce enhancement to the noise. The Hue and Saturation When decoding NTSC signals, TW8811 decoder can adjust the hue of the chroma signal. The hue is defined as a phase shift of the subcarrier with respect to the burst. This phase shift can be programmed through a control register. The color saturation can be adjusted by changing the gain of Cb and Cr signals for all NTSC, PAL and SECAM formats. The Cb and Cr gain can be adjusted independently for flexibility. TECHWELL, INC. 11 REV C 02/07/2008 11 Page

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