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BT856 Dataheets PDF



Part Number BT856
Manufacturers Booktree
Logo Booktree
Description (BT856 / BT857) YCrCb or RGB to NTSC/PAL Digital Video Encoder
Datasheet BT856 DatasheetBT856 Datasheet (PDF)

www.DataSheet4U.com YCrCb or RGB to NTSC/PAL Digital Video Encoder The Bt856/7 is designed specifically for video systems requiring the generation of 525-line (NTSC/PAL–M) or 625-line (PAL–B, D, G, H, I, N, N-Argentina) composite or Y/C (S-video) signals. The Bt856 and Bt857 are functionally identical, with the exception that Bt857 can output the Macrovision anticopy algorithm. Horizontal sync (HSYNC*) and vertical sync (VSYNC*) may be configured as inputs (slave mode) or outputs (master mode). B.

  BT856   BT856


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www.DataSheet4U.com YCrCb or RGB to NTSC/PAL Digital Video Encoder The Bt856/7 is designed specifically for video systems requiring the generation of 525-line (NTSC/PAL–M) or 625-line (PAL–B, D, G, H, I, N, N-Argentina) composite or Y/C (S-video) signals. The Bt856 and Bt857 are functionally identical, with the exception that Bt857 can output the Macrovision anticopy algorithm. Horizontal sync (HSYNC*) and vertical sync (VSYNC*) may be configured as inputs (slave mode) or outputs (master mode). BLANK* is an input and may be externally controlled. 24-bit linear or gamma-corrected RGB data or 4:2:2 YCrCb data may be input. The rise and fall times of sync, the burst envelope, and closed caption data are internally controlled. Analog luminance (Y) and chrominance (C) information is available on the Y and C outputs for interfacing to S-video equipment. The composite analog video signal is output simultaneously onto two analog outputs. This allows one output to provide baseband composite video and another output to drive an RF modulator. Analog RGB is available to support the European SCART/PeriTV interface. Bt856 Bt857 Distinguishing Features • RGB or YCrCb Inputs, Selectable on a Pixel-by-Pixel Basis • NTSC/PAL/PAL–M/PAL–N (Argentina) Composite Video Output • S-Video/RGB Outputs Supported • CCIR 601 or Square Pixel Operation • 2x Oversampling • 9-bit DACs • Master or Slave Video Timing • Noninterlaced Operation • Macrovision Support (Bt857 Only) • Closed Captioning Encoding • Power-Down Mode • SCART Support (RGB Outputs) • I2C Interface • On-Board Voltage Reference • Internal Color Bar Generator • 68-pin PLCC Package Functional Block Diagram IIC DATA IIC CLOCK VREF_OUT VREF_IN FSADJUST Related Products COMP CLKX2 CLKX1 R[0:7] G[0:7] B[0:7] Latch HSYNC* VSYNC* BLANK* Color Space Convert GAMMA Correct Internal VREF 9 DAC • Bt819 • Bt851 • Bt856EVM CVBS/B Applications • • • • • Digital Set Top Box Direct Broadcast Satellite (DBS) Digital Video Disk (DVD) Digital VCR VideoCD 9 2x Upscaling Mod. and Mixer DAC CVBS/G 9 DAC Y/CVBS 1.3 MHz LPF 9 DAC C/R FIELD SLAVE RESET* PAL INTERLACE SQUARE GAMMA* YCMODE SLEEP RGBOUT Brooktree ® Brooktree Corporation • 9868 Scranton Road • San Diego, CA 92121-3707 • 619-452-7580 1-800-2-BT-APPS • FAX: 619-452-1249 • Internet: [email protected] • L856001 Rev. C Ordering Information Model Number Bt856KPJ Bt857KPJ Package 68-Pin Plastic J-Lead 68-Pin Plastic J-Lead Ambient Temperature Range 0˚ to +70˚C 0˚ to +70˚C Copyright © 1994, 1995 Brooktree Corporation. All rights reserved. Print date: 07/21/95 Brooktree reserves the right to make changes to its products or specifications to improve performance, reliability, or manufacturability. Information furnished by Brooktree Corporation is believed to be accurate and reliable. However, no responsibility is assumed by Brooktree Corporation for its use; nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by its implication or otherwise under any patent or patent rights of Brooktree Corporation. Brooktree products are not designed or intended for use in life support appliances, devices, or systems where malfunction of a Brooktree product can reasonably be expected to result in personal injury or death. Brooktree customers using or selling Brooktree products for use in such applications do so at their own risk and agree to fully indemnify Brooktree for any damages resulting from such improper use or sale. Brooktree is a registered trademark of Brooktree Corporation. Product names or services listed in this publication are for identification purposes only, and may be trademarks or registered trademarks of their respective companies. Specifications are subject to change without notice. PRINTED IN THE UNITED STATES OF AMERICA TABLE OF CONTENTS List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .v List of Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Clock Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Pixel Input Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 24-bit RGB Input Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-bit YCrCb Input Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-bit YCrCb Input Mode . . . . . . . . . . . . . . . . . ..


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