bt865a Conexant Systems, Inc., bt865a Datasheet - Page 3

• Manufacturer Part Number: bt865a
• Description: Ycrcb To Ntsc/pal Digital Video Encoder
• Manufacturer: Conexant Systems, Inc.

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.
Functional Block Diagram
100138C
02/17/03
HSYNC*
VSYNC*
RESET*
BLANK*
SLAVE
FIELD
P[7:0]
Y[7:0]
CLK
TTXDAT TTXREQ SDA
Latch
VDD3V
1.3 MHz
LPF
ALTADDR
Upsampling
SCL
2 x
SLEEP
VBIAS VREF
Internal
VREF
Mixer
Mod.
and
Convert
Space
Color
Conexant
RGBOUT
FSADJUST
10
10
10
10
DAC
DAC
DAC
DAC
COMP
CVBS/B
CVBS/G
Y/CVBS
C/R
Distinguishing Features
Related Products
Applications
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
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)
Bt852
Bt856/7
Bt864/5
Bt866/7
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
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C Interface
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