BT864A View Datasheet(PDF) - Conexant Systems

Part Name

Description

Manufacturer

BT864A

YCrCb to NTSC/PAL Digital Video Encoder

Conexant Systems 

Bt864A/865A

YCrCb to NTSC/PAL Digital Video Encoder

The Bt864A/865A 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

TTXDAT TTXREQ SDA SCL VBIAS VREF

FSADJUST

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)

• I2C Interface

• On-board voltage reference

• Power-down modes

• 52-pin PQFP package

• Programmable luma delay

(single-channel)

• 5 V or 3.3 V supply voltage

• CGMS/WSS (16:9)

CLK

P[7:0]

Y[7:0]

RESET*

HSYNC*

VSYNC*

BLANK*

FIELD

SLAVE

Internal

VREF

Latch

1.3 MHz

LPF

2x

Upsampling

Mod.

and

Mixer

10

DAC

10

Color

Space

Convert

10

DAC

DAC

10

DAC

VDD3V

ALTADDR

SLEEP

RGBOUT

COMP

CVBS/B

CVBS/G

Y/CVBS

C/R

Related Products

• Bt852

• Bt856/7

• Bt864/5

• Bt866/7

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

Data Sheet

100138B

September 2000

Share Link: