BT819A datasheet, PDF - EEWORLD Datasheet

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BT819A: DescriptionVideoStream Decoders; File Size625KB，110 Pages; ManufacturerETC

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BT819A Overview

VideoStream Decoders

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Bt819A/817A/815A

VideoStream™ Decoders

Bt819A – Video Capture Processor for

TV/VCR Analog Input

Bt817A – Composite Video and S-Video Decoder

Bt815A – Composite Video Decoder

The Bt819A, Bt817A and Bt815A VideoStream Decoders are a family of single-

chip, pin and register compatible, composite NTSC/PAL video and S-video

decoders. Low operating power consumption and power down capability make

them ideal low-cost solutions for PC video capture applications on both desktop

and portable system platforms. They support square pixel and CCIR601 resolu-

tions for both NTSC and PAL. They have a ﬂexible pixel port which supports a

variety of system interface conﬁgurations, and they are offered in both a 100-pin

PQFP and 100-pin TQFP.

Distinguishing Features

• Single-Chip Composite/S-Video

NTSC/PAL to YCrCb Digitizer

• On-Chip Ultralock

• Square Pixel and CCIR601 Resolu-

tion for NTSC and PAL

• Chroma Comb Filtering

• Arbitrary Horizontal Scaling and

Vertical Scaling (using line store)

• Arbitrary Temporal Decimation

for a Reduced Frame-Rate Video

Sequence

• Programmable Hue, Brightness,

Saturation, and Contrast

• User-Programmable Cropping of

the Video Window

• 2x Oversampling to Simplify

External Analog Filtering

• Two-Wire I

C Bus Interface

• On-Chip 40-Pixel-Deep

Asynchronous Output FIFO

• 8- or 16-Bit Pixel Interface

• YCrCb (4:2:2) Output Format

• Software Selectable Three-Input

Analog Mux

• Auto NTSC/PAL Format Detect

• Automatic Gain Control

• IEEE 1149.1 (JTAG) Interface

• 100-Pin PQFP and TQFP Packages

Functional Block Diagram

XT0

MUX0

MUX1

MUX2

MUXOUT

SYNCDET

REFOUT

YREF+

YIN

YREF–

CREF+

CIN

CREF–

XT1

NALOG

LTRALOCK

AND

JTAG

FIFO

AND

UTPUT

ORMATTING

IDEO

IMING

AGC

ECIMATION

LPF

LOCK

ENERATION

IDEO

IMING

NIT

40 MH

ADC

UMA

-C

HROMA

EPARATION

AND

UTPUT

ONTROL

40 MH

ADC

HROMA

EMODULATION

PATIAL AND

EMPORAL

CALING

Related Products

UTPUT

ATA

• Bt812, Bt858, Bt855,

Bt856, Bt857

• Bt851

Applications

•

Multimedia

Image Processing

Desktop Video

Video Phone

Teleconferencing

Interactive Video

ABLE OF

ONTENTS

List of Figures

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

List of Tables

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix

Functional Description

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Functional Overview

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Bt819A Video Capture Processor for TV/VCR Analog Input. . . . . . . . . . . . . . . . . . . .

Bt817A Composite/S-Video Decoder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Bt815A Composite Video Decoder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Bt819A Architecture and Partitioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

UltraLock

™

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Scaling and Cropping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

C Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pin Descriptions

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Pin Assignments

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

UltraLock

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

The Challenge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Operation Principles of UltraLock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Y/C Separation and Chroma Demodulation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Video Scaling, Cropping, and Temporal Decimation

. . . . . . . . . . . . . . . . . . . . . . . . . . 19

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Horizontal and Vertical Scaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Luminance Scaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chrominance Scaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Scaling Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Image Cropping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cropping Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Temporal Decimation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

The Hue Adjust Register (HUE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

The Contrast Adjust Register (CONTRAST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

The Saturation Adjust Registers (SAT_U, SAT_V) . . . . . . . . . . . . . . . . . . . . . . . . . .

The Brightness Register (BRIGHT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

iii

Video Adjustments

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Bt819A/7A/5A

Electrical Interfaces

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Input Interface

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Analog Signal Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Multiplexer Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Autodetection of NTSC or PAL Video . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Flash A/D Converters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A/D Clamping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Automatic Gain Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Crystal Inputs and Clock Generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2X Oversampling and Input Filtering. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output Interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

YCrCb Pixel Stream Format, SPI Mode 8- and 16-bit Formats. . . . . . . . . . . . . . . . .

Synchronous Pixel Interface (SPI, Mode 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Synchronous Pixel Interface (SPI, Mode 2, ByteStream) . . . . . . . . . . . . . . . . . . . . .

CCIR 601 Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Asynchronous Pixel Interface (API) (Bt819A Only) . . . . . . . . . . . . . . . . . . . . . . . . . .

Mode A: FIFO Controlled by Bt819A (Bt819A Only) . . . . . . . . . . . . . . . . . . . . . . . . .

Mode B: FIFO Controlled by System (Bt819A Only) . . . . . . . . . . . . . . . . . . . . . . . . .

Asynchronous Pixel Interface Control Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Starting and Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Addressing the Bt819A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Reading and Writing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Software Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Need for Functional Veriﬁcation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

JTAG Approach to Testability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Optional Device ID Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Veriﬁcation with the Tap Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output Interface

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

C Interface

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

JTAG Interface

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

PC Board Layout Considerations

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Ground Planes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power Planes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Supply Decoupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Digital Signal Interconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Analog Signal Interconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Latch-up Avoidance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Schematics

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

BT819A Related Products

	BT819A	BT815A	Bt815AKPF	Bt817AKPF	BT817A	Bt819AKPF	Bt817AKTF	Bt819AKTF
Description	VideoStream Decoders	VideoStream Decoders	VideoStream Decoders	VideoStream Decoders	VideoStream Decoders	VideoStream Decoders	VideoStream Decoders	VideoStream Decoders

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