cx25870 Conexant Systems, Inc., cx25870 Datasheet

cx25870

Manufacturer Part Number

cx25870

Description

Video Encoder With Adaptive Flicker Filtering And Hdtv Output

Manufacturer

Conexant Systems, Inc.

Datasheet

1.CX25870.pdf (291 pages)

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Meier Automation Equipment Co., Limited

Part Number:

cx25870-14P

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CONEXANT

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CX25870/871

Video Encoder with Adaptive Flicker Filtering and HDTV Output

Conexant’s CX25870/871 is specifically designed to meet TV out system requirements

for the next-generation desktop PCs, notebook PCs, game consoles and set-top boxes.

With pin and software-forward compatibility to the Bt868/869, manufacturers can

quickly bring to market new solutions that support adaptive flicker filtering, ATSC

High-Definition Television (HDTV) output, and resolutions from 320 x 200 (minimum) to

1024 x 768 (maximum).

characteristics of the video content on a pixel-by-pixel basis and automatically

determines the optimal amount of flicker filtering required. If an end-user wants to work

on a spreadsheet while watching a DVD movie in a window, both the text-intensive

application requiring a lot of flicker filtering and the DVD movie requiring very little

flicker filtering can look their best. The amount of flicker filtering and overscan

compensation is entirely flexible.

the encoder is in HDTV output mode, the device will automatically insert horizontal

tri-level synchronization pulses and vertical synchronization broad pulses. The

CX25870/871 is compliant with the EIA770-3, SMPTE 274M/293M/296M standards and

supports ATSC HDTV resolutions including 480p, 720p, and 1080i.

America, Taiwan), NTSC-J (Japan), PAL-B,D,G,H,I (Europe, Asia), PAL-M (Brazil), PAL-N

(Uruguay, Paraguay), PAL-Nc (Argentina), PAL-60 (China) and SECAM. The CX25870

and CX25871 are functionally identical, except the CX25871 can output standard

definition video with Macrovision Level 7.1.L1 copy protection capability.

Functional Block Diagram

Data Sheet

XTALOUT

ALTADDR

HSYNC*

VSYNC*

Adaptive flicker filtering is a Conexant technology in which the encoder looks at the

The CX25870/871 also provides a 3-wire analog RGB or YP

All worldwide standard definition outputs are supported, including NTSC-M (N.

BLANK*

RESET*

XTALIN

SLEEP

P[23:0]

SLAVE

FIELD

PAL

SIC

SID

XTL_BFO

Interface

DEMUX

Timing

XTAL

Serial

OSC

Input

Conversion

PLL

Conversion

To Internal

Space

Color

Encoder

Space

Color

Video

Clocks

Reference

Internal

Generation

Clock

Flicker

Scaler

MUX

Filter/

DAC

10-Bit

FIFO

BIAS

GEN

FSADJUST

COMP

VREF

DACA

DACB

DACC

DACD

VBIAS

CLKO

CLKI

HDTV output. While

Distinguishing Features

•

HDTV Output Mode (patents pending)

– Compliant with EIA770-3 and

– Automatic tri-level sync generation

– Component (YP

– Direct YP

Software and register

forward-compatibility with the

Bt868/869

Ability to accept many different input

data formats:

– 15/16/24-bit RGB multiplexed or

– 16-bit 4:2:2 and 24-bit 4:4:4 YCrCb

– Flexible pixel ordering with various

Worldwide video output support:

NTSC-M, J, 4.43, PAL-B, D, G, H, I, M,

N, Nc, 60, and SECAM

Interlaced and noninterlaced outputs

S-Video output (simultaneous with

composite NTSC, PAL, or SECAM)

SCART RGB or Y/C output for Europe

– 4th DAC is composite video

–

5-Line vertical filtering scaling for

overscan compensation and flicker

reduction

Adaptive Flicker Filtering for enhanced

image and peaking filters for text

sharpness (patents pending)

CCIR601/ITU-RBT.601 (i.e., 480i) and

CCIR656 compatible input modes

Luma and chroma comb filtering

4 x 10-bit DACs

Programmable power management

Master, pseudo-master or slave timing

operation

Auto detection of TV

44 autoconfiguration modes

Wide-Screen Signaling (WSS) support

for variable clock rates

– Adheres to EIAJ CPR-1024 and

Full register set readback capability

3.3 V operation with scalable low

voltage graphic controller interface

from 1.8 V to 1.1 V

Buffered crystal clock output pin

Component YUV analog output

Colorstream

outputs

Macrovision 7.1.L1 copy protection

(CX25871)

Compact 80-pin PQFP package

SMPTE274M/293M/296M

standards

outputs

progressive RGB graphics video in

1080i, 720p, 480p ATSC

resolutions

nonmultiplexed

multiplexed or nonmultiplexed

alternate formats

EN50-049

ITU-R TST.1119-1 standards

and IEC 933-1 compliant

(EIA 770.2) and Super

component video

or RGB output from

September 2001

) or RGB HDTV

100381B

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