Data Sheet
D860DSA
July 27, 1999
Bt860/861
Multiport YCrCb to NTSC
/
PAL
/
SECAM
Digital Video Encoder
The Bt860/861 is a multiport digital video encoder with pixel synchronization and
per-pixel blending capabilities. The three 8-bit YCrCb data ports allow for a variety of
video and graphic overlay configurations useful in video set-top box applications.
The Bt860/861 is specifically designed for video systems requiring composite,
Y/C (S-Video), and simultaneous component YUV or RGB (SCART) video signals.
Worldwide video standards are supported, including NTSC-M (N. America, Taiwan,
Japan), PAL-B,D,G,H,I (Europe, Asia), PAL-M (Brazil), PAL-N (Uruguay, Paraguay),
PAL-Nc (Argentina), PAL-60, NTSC-443, and SECAM. The Bt860 and Bt861 are
functionally identical except that the Bt861 can output the Macrovision 7.x anticopy
algorithm.
Multisource video is a key feature of the Bt860/861. Two general purpose ports
(P and OSD) allow synchronization with sources that can share clock and frame
timing control with the Bt860/861, such as digital video and graphic overlay content
generated by an MPEG video decoder. A third port (VID) is specifically configured to
interface with video decoders such as those in the Conexant VideoStream decoder
family. Any pair of these three ports can be synchronized and blended.
Functional Block Diagram
VIDHACT
VIDVACT
VID[7:0]
COMP1
COMP2
10
TTXREQ
VIDCLK
VIDVALID
TTXDAT
10
10
10
VIDFIELD
HSYNC*
VSYNC*
BLANK*
FIELD
P[7:0]
OSD[7:0]
CLKO
XTI
XTO
CLKIN
ALPHA[1:0]
10
DAC F
DAC E
DAC D
DAC C
DAC B
DAC A
10
FSADJ1
FSADJ2
SIC
SID
ALTADDR
RESET*
VREF
1.3 MHz
LPF
Teletext
Encoder
Serial
Interface
Internal
VREF
Pixel
Sync.
and
Mixing
2x
Upsampling
Mod.
and
Mixer
DAC
DAC
DAC
DAC
Color
Space
Convert
DAC
Internal
VREF
XTAL
OSC
PLL
Clock
Generation
DAC
Distinguishing Features
Six 10-bit DACs with individual power
management
Simultaneous output of YUV, S-Video,
and CVBS, or RGB (SCART), S-Video,
and CVBS
Current drive output DACs for superior
video quality and reduced system cost
Dynamic video load sensing for reduced
power operation
Three sharpness filter options (1,2,3.5 dB
gain) and four reduction filter options
Programmable adjustment of brightness,
contrast, color saturation, and hue
Glueless interface with a video decoder
Three 8-bit YCrCb 4:2:2 inputs for overlay
or blending
ITU-R BT.656, ITU-R BT.601 digital video
input options
NTSC-M, PAL (B,D,G,H,I), PAL-M, PAL-N,
NTSC-443, PAL-Nc, PAL-60 and SECAM
video output
2x upsampling and internal filtering for
reduced cost
Master or slave video timing with
programmable HSYNC* delay
Interlaced/noninterlaced operation
Macrovision 7.x copy protection (Bt861)
Closed Captioning and Extended Data
Services encoding
Teletext encoding (WST system B)
400 kHz serial programming interface
On-board voltage reference
Reduced power modes
Programmable luma delay (two channels)
3.3 V supply, 5 V-tolerant inputs
Copy Generation Management System
(CGMS) support
VARIS-II and Wide Screen Signalling
(WSS) multiple aspect ratio support
Internal color bar generation
Blue field generation
80-pin MQFP package
Related Products
Bt852, Bt868/869, Bt864A/865A,
Bt866/867
Bt835, Bt829A/B
Applications
Digital cable television systems
Satellite TV receivers (DBS/DVB/DSS)
DVD players
Video CD players
Digital cameras
PC add-on cards
Video editing
D860DSA
Conexant
Information provided by Conexant Systems, Inc. (Conexant) is believed to be accurate and reliable. However, no responsibility is
assumed by Conexant for its use, nor any infringement of patents or other rights of third parties which may result from its use. No
license is granted by implication or otherwise under any patent rights of Conexant other than for circuitry embodied in Conexant
products. Conexant reserves the right to change circuitry at any time without notice. This document is subject to change without
notice.
Conexant products are not designed or intended for use in life support appliances, devices, or systems where malfunction of a
Conexant product can reasonably be expected to result in personal injury or death. Conexant customers using or selling Conexant
products for use in such applications do so at their own risk and agree to fully indemnify Conexant for any damages resulting from
such improper use or sale.
Conexant and "What's Next in Communications Technologies" are trademarks of Conexant Systems, Inc.
This device is protected by U.S. patent numbers 4,631,603, 4,577,216, and 4,819,098, and other intellectural property rights. The use
of Macrovision's copy protection technology in the device must be authorized by Macrovison and is intended for home and other
limited pay-per-view uses only, unless otherwise authorized in writing by Macrovision. Reverse engineering or disassembly is
prohibited.
Product names or services listed in this publication are for identification purposes only, and may be trademarks or registered
trademarks of their respective companies. All other marks mentioned herein are the property of their respective holders.
1999 Conexant Systems, Inc.
Printed in U.S.A.
All Rights Reserved
Reader Response: To improve the quality of our publications, we welcome your feedback. Please send comments or
suggestions via e-mail to
Conexant Reader Response@conexant.com
. Sorry, we can't answer your technical
questions at this address. Please contact your local Conexant
sales office
(listed on back page) or applications
engineer if you have technical questions.
Ordering Information
Model Number
Package
Operating Temperature
Bt860KRF
80Pin MQFP
0
C70
C
Bt861KRF
80Pin MQFP
0
C70
C
D860DSA
Conexant
iii
Table of Contents
List of Figures
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
List of Tables
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
1.0
Functional Description
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.1
Pin Descriptions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.2
Functional Overview
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
2.0
Inputs and Timing
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.1
Reset
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.1.1
Initialization and Power-up Configuration
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.2
Digital Video Ports
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.2.1
The P Port
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
2.2.2
The VID Port
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
2.2.3
The OSD Port
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
2.2.4
Overlay Modes and Alpha Blending
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
2.2.5
Alpha Pin Blending
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
2.2.6
Content-based Blending
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
2.3
Configurations and Timing
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
2.3.1
ITU-R BT.601 Configurations and Timing
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
2.3.2
ITU-R BT.656 Timing
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
2.3.3
VID Port (Video Decoder Locked) Timing
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
2.4
Clock Selection
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
2.4.1
Crystal Inputs and the PLL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Table of Contents
Bt860/861
Multiport YCrCb to NTSC/PAL /SECAM
iv
Conexant
D860DSA
3.0
Digital Processing and Functionality
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.1
Video
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.1.1
Video Standards
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.1.2
Analog Horizontal Sync
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
3.1.3
Analog and Digital Vertical Sync
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
3.1.4
Analog Video Blanking
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
3.1.5
Subcarrier and Burst Generation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
3.1.6
Subcarrier Phasing (SC_H Phase)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
3.1.7
Noninterlaced Operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
3.2
Effects
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
3.2.1
Chrominance Disable
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
3.2.2
Internal Filtering
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
3.2.3
Internal Colorbars, Blue Field, and Black Burst
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
3.2.4
Setup
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19
3.2.5
YUV and RGB Multipliers
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19
3.2.6
Programming Values to Comply with YPrPb and RGB
. . . . . . . . . . . . . . . . . . . . . . . . . . 3-19
3.2.7
Programmable Video Adjustments Controls
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20
3.2.7.1
Hue Adjust
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20
3.2.7.2
Brightness Adjust
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20
3.2.7.3
Contrast Adjust
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21
3.2.7.4
Saturation Adjust
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21
3.2.7.5
Sharpness Adjust
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21
3.2.8
Macrovision Encoding (Bt861 Only)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22
3.2.9
Outputs
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22
3.2.10
Luminance Delay
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22
3.2.11
Special SCART Signals
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23
3.2.12
Output Connection Status
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23
3.2.13
Output Filtering and SINX/X Compensation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24
3.2.14
Low Power Features
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24
3.2.15
Teletext Operation of Bt860/861
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25
3.2.15.1
Teletext Timing Mode 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26
3.2.15.2
Teletext Timing Mode 2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26
3.2.15.3
General Teletext Operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27
3.2.16
Wide Screen Signaling
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27
3.2.17
Copy Generation Management System
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-28
3.2.18
Closed Captioning and Extended Data Services
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-29
3.2.18.1
Closed Captioning Pass-through
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30
Bt860/861
Table of Contents
Multiport YCrCb to NTSC/PAL /SECAM
D860DSA
Conexant
v
4.0
Applications
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.1
PC Board Considerations
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.1.1
Component Placement
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.1.2
Power and Ground Planes
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.1.3
Device Decoupling
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
4.1.4
Power Supply Decoupling
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
4.1.5
COMP Decoupling
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
4.1.6
VREF Decoupling
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
4.1.7
VBIAS Decoupling
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
4.1.8
Digital Signal Interconnect
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
4.1.9
Analog Signal Interconnect
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
4.1.10
ESD and Latchup Considerations
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
5.0
Serial Programming Interface and Registers
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5.1
Serial Interface
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5.1.1
Device Address
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
5.1.2
Writing Data
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
5.1.3
Reading Data
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
5.2
Internal Registers
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
5.2.1
Register Bit Map
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
5.3
Register Index
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
5.4
Register Detail
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13
6.0
Parametric Data and Specifications
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
6.1
Electrical Specifications
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
6.1.1
Electrical Parameters
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
6.2
Mechanical Drawing
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
PDF 
ZIP