Bt864A/Bt865A
YCrCb to NTSC/PAL Digital Video Encoder
Data Sheet
100138C
February 2003
Ordering Information
Model Number
Bt864AKRF
Bt865AKRF
Description
YCrCb to NTSC/PAL Digital Video Encoder without Macrovision
YCrCb to NTSC/PAL Digital Video Encoder with Macrovision
Package
52-Pin MQFP
52-Pin MQFP
Revision History
Revision
A
B
C
Date
08/26/97
09/26/00
02/17/03
Description
Initial release (document L865A)
Company name change
Incorporates two Erratas: 102084A and d864er3 (100184B)
© 2003,
Conexant Systems, Inc.
All Rights Reserved.
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omissions in these materials. Conexant may make changes to specifications and product descriptions at any time, without notice. Conexant
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ii
Conexant
100138C
02/17/03
Bt864A/Bt865A
YCrCb to NTSC/PAL Digital Video Encoder
Data Sheet
The Bt864A/Bt865A is specifically designed for video systems requiring the
generation of composite, Y/C (S-video) or RGB (SCART) video signals from an 8- or
16-bit YCrCb digital video stream. 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) and PAL–Nc (Argentina). The Bt864A and Bt865A are
functionally identical, with the exception that Bt865A can output the Macrovision level
7 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. Horizontal and vertical blanking are automatically generated. 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 outputs. This allows one output to provide baseband
composite video while the other drives an RF modulator. Analog RGB is also available
to allow for support of the European SCART/PeriTV interface.
Distinguishing Features
8- or 16-bit 4:2:2 YCrCb inputs
NTSC-M/PAL/PAL–M/PAL–N/PAL–Nc
composite video outputs
S-Video/RGB (SCART) outputs
CCIR 601 or square pixel operation
2x oversampling
10-bit DACs
Master or slave video timing
Auto mode detection function
(slave mode)
Interlaced/noninterlaced operation
Macrovision 7 support (Bt865A only)
Closed caption encoding
Teletext encoding (WST system B)
I
2
C Interface
On-board voltage reference
Power-down modes
Programmable luma delay (single-
channel)
5 V or 3.3 V supply voltage
Copy Generation Management System
(CGMS)
Functional Block Diagram
TTXDAT TTXREQ SDA
SCL
VBIAS VREF
FSADJUST
Related Products
Internal
VREF
10
COMP
CLK
Bt852
Bt856/7
Bt864/5
Bt866/7
P[7:0]
Y[7:0]
RESET*
HSYNC*
VSYNC*
BLANK*
1.3 MHz
LPF
10
DAC
CVBS/B
Applications
Digital cable systems
Satellite television setup boxes (DBS/DSS)
DVD players
Digital VCR (DVC, DVHS)
VideoCD players
Portable VideoCD players
Digital cameras
PC add-on cards
Latch
2x
Upsampling
Mod.
and
Mixer
Color
Space
Convert
10
DAC
CVBS/G
DAC
10
Y/CVBS
DAC
C/R
FIELD
SLAVE
VDD3V
ALTADDR
SLEEP
RGBOUT
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02/17/03
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Contents
Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
1
Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.1
1.2
1.3
Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Clock TIming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Pixel Input Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
1.3.1 8-bit YCrCb Input Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
1.3.2 16-bit YCrCb Input Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
1.3.3 Pixel Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
HSYNC* Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
1.4.1 Master Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
1.4.2 Slave Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Video Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
1.5.1 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
1.5.2 Sync and Burst Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
1.5.3 Master Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
1.5.4 Slave Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
1.5.5 FIELD Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
1.5.6 Pixel Blanking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
1.5.7 Burst Blanking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
1.5.8 Digital Processing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
1.5.9 Chrominance Disable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
1.5.10 Subcarrier Phasing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
1.5.11 Vertical Blanking Intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
1.5.12 BLANK* Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
1.5.13 Noninterlaced Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
Power Saving Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22
Pixel Input Ranges and Colorspace Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22
1.7.1 YC Inputs (4:2:2 YCrCb) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22
1.7.2 DAC Coding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
Closed Captioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
1.4
1.5
1.6
1.7
1.8
100138C
02/17/03
Conexant
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