FUSION878A 查看數據表（PDF） - Conexant Systems

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FUSION878A

PCI Video Decoder

Conexant Systems 

Fusion™ 878A

PCI Video Decoder

The Fusion 878A is a complete, low cost, single-chip solution for analog

broadcast signal capture on the PCI bus. The Fusion 878A takes advantage

of the PCI-based system’s high bandwidth and inherent multimedia

capability. It is designed to be interoperable with any other PCI multimedia

device at the component or board level.

The Fusion 878A has all the video and audio capture features of the

Bt878, plus a whole lot more. Designed to address the demanding

requirements of the Personal Computing and digital video industry, Fusion

878A meets PC98/PC99 requirements as well as being fully PCI 2.2

compliant. Fusion 878A addresses the current analog PC TV requirements

since it is pin for pin compatible and software compatible with the current

Bt878. But, Fusion 878A can also be used in an array of MPEG digital

transport stream products as well. The world is turning digital, with new

standards in Television – ATSC and COFDM – and Television recording

technologies using MPEG compression. Fusion 878A can be used as the hub

into the PC connecting the multiple analog and digital video formats in the

PC via a single PCI connection.

Functional Block Diagram

Composite 1

Composite 2

Composite 3

Composite 4

Composite S-Video (Y)

S-Video (C)

I2S (dig. audio)

TV

FM

Mic

879A_001

GPIO and Digital/Video Port

40 MHz

ADC

40 MHz

ADC

Pixel

Format

Conversion

I2C

GPIO

Video FIFO

DMA

Target

Video

Controller

Initiator

Decode

and Scaling

PCI I/F

PCI

Bus

Ultralock™

and Clock

Generation

DMA

Controller

Audio FIFO

Target

Initiator

Audio

Stream

Format

Input

Gain

Control

High BW

Audio

ADC

Distinguishing Features

• NTSC/PAL/SECAM video decoding

• Supports capture resolutions up to 768 x 576 (full

PAL)

• On-chip PCI bus mastering and bridge

functionality

• Supports HDTV/audio/MPEG2 transport data

across PCI bus

• High-speed serial port support MPEG transport

stream up to rates of 40 Mbps

• High-speed parallel port supports MPEG transport

streams up to 20 Mbps

• Flexible 24-bit wide GPIO

• CCIR656 interface

• Interfaces to a Digital TV data stream from a VSB

or OFDM demodulator

• Multiple YCrCb and RGB pixel formats and YUV

planar formats supported on output

• Selectable pixel density: 8, 16, 24, and 32 bits per

pixel

• Performs complex clipping of video source and

VGA video overlay

• Permits different program control and color

space/scaling for even and odd fields

• Executes Windows 98 “Scatter and Gather”

• Integrates advanced chroma and luma comb

filters/scalers

• Image scaleable in X and Y direction

• Y/C, 6-tap luma/2-tap chroma polyphase filter

• Receives Digital audio via I2S serial port

• Includes VBI data capture (closed captioning,

teletext, and Intercast data decoding)

• 100% PCI Rev. 2.2 compliant

• PC 98/PC 99 compliant

• WHQL-certifiable

• Accepts Mono audio input

• Packaged in compact 128-pin plastic QFP

Fusion 878A Specific Features

• Full stereo decoding for both TV audio (BTSC) and

FM radio

• Enhanced GPIO/I2S

• ACPI support

• Byte alignment

• Vital product data

• High speed serial port

• High speed parallel port

Applications

• PC television

• Digital television

• Digital VCR

• Desktop video phone

• Still frame capture

• VBI data service capture

Data Sheet

100600B

December 3, 1999

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