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Электронный компонент: CX25873

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True international support for NTSC,
PAL and SECAM output
Adaptive flicker filtering
Supports resolutions from 320 x 200
to 1024 x 768
Pin compatible with the CX25874
and CX25875
Programmable overscan ratios from
0% to 25%
Software forward compatible with
CX25870 and CX25871
d i g i t a l i n f o t a i n m e n t p r o d u c t s
High Performance
Video Encoder
C X 2 5 8 7 2 / C X 2 5 8 7 3
Distinguishing Features
Video Encoder with Support for "Adaptive"
Flicker Filtering and 1024 x 768 Resolution
Conexant's CX25872 and CX25873 video encoders are specifically
designed to meet TV-out cost and performance requirements for
next-generation desktop and notebook PCs, game consoles and
set-top boxes. With software forward compatibility to the CX25870
and CX25871, manufacturers can quickly bring to market new solutions
that provide true international television display (NTSC, PAL and
SECAM output), resolutions from 320 x 200 to 1024 x 768 and
programmable overscan compensation capability from 0% to 25%.
The CX25872 and CX25873 also provide adaptive flicker filtering,
48 automatic configuration modes and offer 10-bit DACs.
Adaptive Flicker Filtering
The CX25872 and CX25873 include Conexant's unique adaptive
flicker-filtering capability. With this feature the optimal amount of
flicker filtering for a given application is automatically determined
by the characteristics of the pixel content. Now both an Excel
spreadsheet and a DVD movie can look great at the same time.
Consumers do not have to manually adjust the amount of flicker
filtering as they switch from applications requiring significant flicker
filtering (e.g., text-intensive applications like an Excel spreadsheet)
to those requiring little or no flicker filtering (e.g., a DVD movie).
International Support
The CX25872 and CX25873 provide the most complete support for
products with TV-out capability shipped to the U.S. and international
markets.The CX25872 and CX25873 provide support for international
standards including NTSC (North America, Taiwan, Japan), PAL-B,
D, G, H, I (Europe, Asia), PAL-M (Brazil), PAL-N (Paraguay), PAL-Nc
(Argentina), PAL-60, SECAM-D, K, K1 (Russia), SECAM-B, G, H
(Middle East) and SECAM-L (France).
f e a t u r e s a n d s p e c i f i c a t i o n s
Adaptive flicker filtering for enhanced
image and text sharpness
Lowest BOM cost
Supports any input resolution from
320 x 200 to 1024 x 768
48 automatic configuration modes
Lowest component count
Programmable power management
Software-forward compatibility with
the CX25870, CX25871
Pin compatibility with the
CX25874, CX25875
5-line vertical and horizontal
flicker filtering
WSS 16:9 (wide screen signaling)
support
Macrovision 7.1.L1 copy protection
10-bit DACs for superior picture quality
Wide selection of overscan
compensation ratios
Serial programming interface
Buffered crystal clock output
NTSC/PAL/SECAM TV outputs:
Interlaced or non-interlaced
Composite
S-video (Y/C)
Simultaneous S-video and
Composite
YUV
YCrCb non-interlaced input to
interlaced output
16-bit 4:2:2 multiplexed 8-bit input
24-bit 4:4:4 multiplexed 12-bit input
RGB non-interlaced input to
interlaced output
15/16-bit multiplexed 8-bit input
24-bit multiplexed 12-bit input
RGB non-interlaced input to RGB
non-interlaced output
15/16-bit multiplexed 8-bit input
24-bit multiplexed 12-bit input
RGB or YCrCb interlaced input to
interlaced output
CCIR656
CCIR601/DVD
VESA VIP
64-pin TQFP
Applications
Desktop PCs
Graphics cards
Notebook computers
Game consoles
Digital television receiver cards
Living room PCs
Internet PCs
Progressive DVD players
Set-top boxes
Pixel Input Formats and Timing
The CX25872 and CX25873 convert a wide range of input
formats to television video formats. The input resolution
can be non-interlaced with an active resolution of 320 x 200
to 1024 x 768 or interlaced such as CCIR601, CCIR656 and
VESA VIP. Conexant is the only provider of video encoders
that have the flexibility to offer any resolution in this range
with so many input and output format options. This includes
the exact resolution to display DVD movies in either NTSC
or PAL formats.
Overscan Compensation
The CX25872 and CX25873 support overscan ratios as
low as 0% (truly to the bezel of the TV) and as high as 25%
(25% of the screen is black).
Automatic Configuration Modes
The CX25872 and CX25873 offer enhanced auto configuration
mode functionality. A total of 48 different modes are now
available, which provide pre-programmed register settings
for more than 95% of typical TV-out settings. For example,
PAL-M can be automatically configured to an input resolution
of 640 x 480 RGB with a moderate amount of overscan
compensation with just a single register write.
Register Readback
The CX25872 and CX25873's full-register readback capability
provides a real time-to-market advantage for manufacturers
as they develop new products.
Macrovision
TM
Support
The CX25873 provides Macrovision 7.1.L1 copy protection.
www.conexant.com
General Information:
U.S. and Canada: (800) 854-8099
International: (949) 483-6996
Headquarters Newport Beach
4311 Jamboree Rd, P.O. Box C
Newport Beach, CA 92660-3095
Order# 101813A
02-0170
2002, Conexant Systems, Inc. All Rights Reserved.
Conexant and the Conexant logo are trademarks
of Conexant Systems, Inc. Other trademarks are
owned by their respective owners. Although Conexant
strives for accuracy in all its publications, this material
may contain errors or omissions and is subject to
change without notice.
THIS MATERIAL IS PROVIDED AS IS
AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE AND NON-INFRINGEMENT.
Conexant shall not be
liable for any special, indirect, incidental or consequential
damages as a result of its use.
Product Features
P[11:0]
HSYNC
VSYNC
BLANK
FIELD
SIC
SID
ALTADDR
RESET
SLEEP
XTALIN
XTALOUT
Input
Demux
Timing
Serial
Interface
XTAL
OSC
XTL_BFO
Color Space
Conversion
#1
Flicker
Filter/Scaler
FIFO
Internal
Reference
Video
Encoder
To Internal Clocks
PLL
DAC
Mux
Clock
Generation
10-bit
10-bit
10-bit
FSADJUST
COMP
VREF
DACA
DACB
DACC
CLK 0
CLK 1
Color Space
Conversion
#2
CX25872 /CX25873 block diagram