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BT856 Datasheet(PDF) 1 Page - List of Unclassifed Manufacturers

Part No. BT856
Description  YCrCb or RGB to NTSC/PAL Digital Video Encoder
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Maker  ETC [List of Unclassifed Manufacturers]
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Brooktree®
Brooktree Corporation • 9868 Scranton Road • San Diego, CA 92121-3707 • 619-452-7580
1-800-2-BT-APPS • FAX: 619-452-1249 • Internet: apps@brooktree.com • L856001 Rev. C
Bt857
Bt856
YCrCb or RGB to NTSC/PAL
Digital Video Encoder
Functional Block Diagram
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
Related Products
Bt819
Bt851
Bt856EVM
Applications
Digital Set Top Box
Direct Broadcast Satellite (DBS)
Digital Video Disk (DVD)
Digital VCR
VideoCD
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) compos-
ite 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 inter-
nally 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.
Internal
RESET*
C/R
Y/CVBS
CVBS/G
COMP
1.3 MHz
LPF
VREF_IN
FSADJUST
DAC
DAC
DAC
CVBS/B
DAC
9
GAMMA
Correct
Color
Space
VREF_OUT
Latch
R[0:7]
G[0:7]
B[0:7]
HSYNC*
VSYNC*
BLANK*
CLKX2
CLKX1
PAL INTERLACE
SQUARE GAMMA* YCMODE
RGBOUT
IIC CLOCK
IIC DATA
Convert
Mod.
and
Mixer
2 x
Upscaling
9
9
9
FIELD
SLAVE
SLEEP
VREF




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