Conexant’s product portfolio of multimedia ICs provide the finest combination of features, video performance, flexibility, size and value for today’s Set Top Box, PC Video, DVD playback, Digital Photography and other video systems. Key features such as 10-bit current output DACs, worldwide video standards support, interfaces with common bus architectures and compact packages provide the ultimate combination of video performance, quality, ease of design and overall value.

Bt860/Bt861

High-Performance Multisource Video for a Wide Range of Systems
Conexant’s Bt860 and Bt861 are multiport digital video encoders with pixel synchronisation and per-pixel blending capabilities. The three 8-bit YCrCb data ports allow for a variety of video and graphics overlay configurations useful in video set-top box applications. The Bt860/861 is designed specifically for video systems requiring the generation of simultaneous composite, S-video (Y/C) and either component YUV or RGB (SCART) video signals.

High-performance video combined with the right set of features make the Bt860/861 a versatile device for almost any video system. 10-bit DACs provide the clear, lifelike video required for modern satellite and cable television set-top boxes, Super VCD and DVD players, PC add-in cards, video conferencing systems and digital cameras. Several power conservation modes extend portable system battery life and help reduce system heating. New televisions and media which make use of wide screen 16:9 aspect ratios are also supported by the Bt860/861 to provide the best flexibility, performance and functionality.

Multisource video is a key feature of the Bt860/861. The primary video port (P) is designed to accept both digital video and graphics overlay content from an MPEG video decoder or OSD ICs. This input stream can be either ITU-R BT.601 or 656 in format — as is typically generated by MPEG decoder ICs. The second video port (VID) will accept an alternate digital video stream from a video decoder, such as Conexant’s Video Stream family of devices. The third port (OSD) may be used for dedicated graphics overlay devices, such as providing a higher- quality user interface or superior on-screen titles. Alternatively, a second MPEG decoded stream could also be the input to the OSD port for use with multiple MPEG decoder ICs. A pixel synchronisation mechanism ensures proper timing between the three ports to deliver the highest-video quality.

Worldwide Standards Supported
Worldwide video standards are supported, including NTSC-M (North America, Taiwan, Japan), PAL-B,D,G,H,I (Europe, Asia), PAL-M (Brazil), PAL-N (Uruguay, Paraguay), PAL-Nc (Argentina), PAL-60, and SECAM. The Bt860 and Bt861 are pin and functionally identical, except the Bt861 also contains Macrovision 7.X copy protection circuitry used in DVD players and TV set-top boxes. This permits all types of video systems to use the Bt860/861 and achieve truly high-performance video.

Multiple Video Outputs for Televisions of All Varieties
The Bt860/861 provides analogue luminance (Y) and chrominance (C) information in the Y and C outputs for interfacing with equipment having S-Video inputs. Component video outputs for Y, and the colour component signals (U and V) are available for use with the latest DVD players and high-performance televisions. Analogue RGB video is also available to permit support of the European SCART/PeriTV interface. Composite analogue video is output simultaneously to interface with all types of televisions, and VCRs.

One composite analogue output has a programmable luma delay to permit the synchronisation of both luminance and chrominance when video is transmitted via an RF modulator. A video multiplexer on the output permits tremendous flexibility of output signal configurations. A two-wire teletext (WST-B) interface is also included in the Bt860/861. The table below illustrates the various output configurations of the Bt860/861 DACs.

I2C Interface
Bt860/861 registers are accessed via a two-wire Inter Integrated Circuit (I2C) interface. Serial clock and data lines, SCL and SDA, are used to transfer data at a rate of 100 Kbps. These lines are used to access and program the internal registers of the device, including the Macrovision registers of the Bt861. Deactivation of I2C communication is possible by asserting sleep or reset modes.

Implementation
The Bt860/861 is packaged in an 80-pin Plastic Quad Flat Pack (PQFP) with a 16.95 x 17.45 mm body size. It requires only a minimum of discrete passive support components. It is ideal for low-cost, high-performance video systems and consumer electronics.

Features
Six 10-bit DACs with individual power management
Simultaneous output of RGB, S-video, and CVBS, or YUV, S-video, and CVBS
Current drive output DACs for superior video quality and reduced system cost
Dynamic video load sense circuitry for reduced power operation
Four output sharpness filtering options (0, 1, 2, 3.5 dB gain)
Programmable adjustment of brightness, contrast, colour saturation, and hue
Glueless interface with a video decoder output supports locking to a digital
   video input stream
Three 8-bit 4:2:2 YCrCb inputs for simultaneous digital video and graphics
   overlays
Worldwide NTSC, PAL, PAL-60 and SECAM video standard outputs
ITU-R BT.656-4, ITU-R BT.601-5 and square pixel digital video input options
2X oversampling and internal filtering for reduced cost
3.3V single supply voltage with 5V tolerant inputs
Multiple aspect ratio output support (VARIS II, WSS 4:3, 14:9, 16:9)
Programmable luma delay (two-channels)
Master or slave video timing with programmable HSYNC delay
Interlaced/noninterlaced operation
Teletext encoding (WST system B)
Closed Caption and Extended Data Services encoding
On-board voltage reference for greater accuracy and stability
Reduced power modes
400 KHz serial programming interface
Internal colour bar generation for simplified systems testing
Macrovision 7.x copy protection circuitry (Bt861 only)
Housed in a compact 80-pin MQFP package

Related Products
Bt835, Bt852, Bt856/857, Bt864A/865A, Bt866/867, Bt868/869

High Performance YCrCb to NTSC/PAL Digital Video Encoders
Conexant’s Bt864A and Bt865A are designed for video systems that require the generation of high-quality composite, Y/C (S-video) or RGB (SCART) video signals from an 8- or 16-bit YCrCb 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 pin-compatible and functionally identical, except the Bt865A can also output the Macrovision™ version 7 anticopy algorithm. Either master or slave mode operation may be implemented to provide the highest video performance when interfaced with the Conexant, or other MPEG decoder. CCIR 601 or square pixel video signals may be input to provide maximum flexibility in the system architecture.

Flexible Operation for a Wide Range of Video Systems
High-performance video combined with the right set of features make the Bt864A/865A a versatile device for almost any video system. 10-bit DACs provide the high-resolution video required for modern satellite set-top boxes, DVD players, PC add-in cards, video conferencing systems and digital cameras. Several power conservation modes extend portable system battery life and help to reduce system heating. New televisions and media, which make use of wide screen 16:9 aspect ratios, are also supported by the Bt864A/865A to provide the best flexibility, performance and functionality.

The Bt864A/865A accepts video data in a variety of ways: CCIR 601, NTSC, and PAL square pixel formats. This provides system designers with maximum flexibility. Either 3.3V or 5V operation is possible with the Bt864A/865A to permit operation within any system environment. Horizontal sync and vertical sync may be configured as inputs (slave mode) or outputs (master mode). In addition to the normal blanking which occurs during Hsync and Vsync, blanking may be externally controlled during active video. The rise and fall times of sync, the burst envelope, and closed caption data are internally controlled.

Analogue luminance (Y) and chrominance (C) information is available on the Y and C outputs for interfacing to S-video equipment. The composite analogue video signal is output simultaneously onto two outputs. This enables two simultaneous baseband composite video signals, or one output, to provide baseband composite video while the other drives an RF modulator. Programmable luminance delay (single-channel) permits the synchronisation of both luminance and chrominance when video is transmitted to a television monitor via an RF modulator. Analogue RGB is also available to allow for support of the European SCART/PeriTV interface. A two-wire teletext (WST-B) interface is also included in the Bt864A/865A.

I2C Interface
Bt864A/865A registers are accessed via a two-wire Inter-Integrated Circuit (I2C) interface. Serial clock and data lines (SCL and SDA) are used to transfer data at a rate of 100 Kbps. These lines are used to access and program the internal registers of the device, including the Macrovision registers of the Bt865A. Deactivation of I2C communication is possible by asserting sleep or reset modes.

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/non-interlaced 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)
3.3V or 5V supply voltage
VARIS-II (16:9) aspect ratio support

Bt866 YCrCb to NTSC/PAL Digital Video Encoder with Overlays

	Bt866/867 YCrCb to NTSC/PAL Digital Video Encoder with Overlays
	Encoders
	Encoder Last Time Buy Notice

The Bt866 Digital Video Encoder is designed for systems which generate S-Video, and CVBS analogue video outputs. Worldwide video standards are supported including NTSC and PAL (B,D,G, H, I, M, N, Nc). Popular applications include Satellite and Cable Television set-top boxes, Video Conferencing systems, Portable Video systems, and Security systems. Three 9-bit DACs with built-in current outputs permit the ultimate combination of user flexibility, PCB space savings, and very high quality video outputs.

Please refer to Bt864A/865A and Bt860/1

• 8-bit or 16-bit 4:2:2 YCrCb inputs
• NTSC-M, PAL-B,D,G,H,I,M,N,Nc Video supported
• Simultaneous CVBS & S-Video outputs
• CCIR 601 or Square Pixel operation
• 60 Hz operation for M-systems
• 15-color 24-bit overlay with optional 8-segment test mode

Bt868/Bt869

	Programming an EEPROM for the Bt878/879
	Interfacing the Bt868/9 VGA Encoder to a Graphics Controller
	Bt868/9 DVD Movie Playback Architecture and Solutions
	Bt868/9 Supporting TV Out with Non-Standard Graphics lnput Resolutions
	Bt878/879 Single-Chip Video and Broadcast Audio
	Flicker-Free Video Encoder with UltrascaleTM Technology
	Bt878/Bt879 Errata Sheet
	Bt868/Bt8699
	Bt868KRF Last Time Buy Notice
	Bt869KRF Obsolescence Notice
	Fusion Bt878/879 Media Decoders
	Fusion™ Media Decoders Product Brief
	Digital Video Encoder Product Brief
	Bt868/9KRF and CX25872/3 Functional and Feature Differences Between the Bt868/9KRF and CX25872/3 Product Bulletin

Highest Quality Flicker-Free YCrCb/RGB to NTSC/PAL Digital Video Encoder with UltraScale™ (PC to TV) Technology
Conexant’s Bt868 and Bt869 are specifically designed for video requiring the generation of high-quality flicker-free composite and Y/C (S-video) signals from various YCrCb or RGB digital streams.

The Bt868/869 digital video encoders provide the industry’s highest TV-out flicker-free output from both interlaced and non-interlaced (e.g., personal computer) image sources. Conexant’s UltraScale technology provides a fully programmable DSP engine that allows for the use of the entire viewable area of a television screen. The device performs 5-line vertical filtering which includes poly phase interpolation scaling for overscan compensation and flicker filtering. Using the on-chip PLL and poly-phase interpolator, the device preserves all the components of the input signal to create the highest quality display of all video — including text-intensive images on NTSC/PAL TVs.

Device Architecture
The Bt868/869 consists of a Colour Space Converter/ Flicker Filter engine followed by a video encoder engine. The Colour Space Converter/Flicker Filter contains a timing generator for requesting and accepting data from a graphics controller, a colour space converter, and various horizontal video processing functions — as well as the flicker filter and vertical scaler for the overscan compensation. The output of this engine is fed into a FIFO for synchronisation with the following video encoder engine.

Flicker Removal and Scaling Architecture
The Bt868/869 performs 5-line vertical filtering, which includes poly-phase interpolation scaling for overscan compensation and flicker filtering. The Bt868/869 accepts both 640 x 480 and 800 x 600 digital input formats. Conexant’s UltraScale technology converts lines of input pixel data to appropriate numbers of output lines. Ultrascale technology provides the most advanced vertical and horizontal scaling available today, allowing for the display of non-interlaced data on interlaced devices such as televisions. Horizontal scaling for overscan compensation is achieved by altering the encoder clock frequency. This approach preserves all of the high-frequency components of the input signals, which are essential for display of text-intensive images such as Web pages on TVs. The Bt868/869 performs no additional horizontal processing on the input pixels, allowing the full bandwidth of the input image to be output, limited only by the 2x upsampling filter response, which is nominally greater than 6 MHz. The amount of flicker filtering is programmable. This process trades off vertical resolution in order to reduce the flicker, and allows the image to be optimised.

Auto Configuration
The Bt868/869 can configure itself for one of eight combinations of video formats and input modes with a single register write. This reduces the software support required, yet allows full flexibility in generating video formats and timing. Once the device is configured, all the registers are accessible to modify the modes. For less common modes, the device can be configured for the closest mode, and only those registers that differ need to be programmed.

Pixel Input Formats and Timing
The Bt868/869 converts a wide range of input formats to television video formats. The input format can be either non-interlaced in 640 x 480 or 800 x 600 formats, or interlaced formats such as CCIR 601 format (VMI spec).

Master and Slave Modes
The Bt868/869 can operate as either a timing master or a slave. In master mode, the device will generate and output HSYNC, VSYNG and BLANK. In slave mode, HSYNC, VSYNG and BLANK must be provided externally. It is highly recommended that the device operate as a master, in order to ensure that the input and output video stream remain synchronised. By running the device in master mode, any timing errors that occur can be absorbed to some extent by the on-board FIFO.

Worldwide Video Standard Support
The Bt868/869 supports worldwide video standards including NTSC-M (North America, Taiwan, Japan), PAL-B, D, G, H, I (Europe, Asia), PAL-M (Brazil), PAL-N (Paraguay), and PAL-Nc (Argentina).

Macrovision™ Support
The Bt868 and Bt869 are functionally identical, with the exception that the Bt869 can output the Macrovision Level 7.01 anticopy algorithm.

Features
YCrCb non-interlaced inputs to interlaced output
   - 16-bit 4:2:2 multiplexed 8-bit inputs
   - 24-bit 4:4:4 multiplexed 12-bit inputs
   - 24-bit 4:4:4 non-mux 24-bit inputs
RGB non-interlaced inputs to interlaced output
   - 15/16-bit multiplexed 8-bit inputs
   - 24-bit multiplexed 12-bit inputs
   - 24-bit non-mux 24-bit inputs
RGB non-interlaced inputs to
RGB non-interlaced output
   - 15/16-bit multiplexed 8-bit inputs
   - 24-bit multiplexed 12-bit inputs
   - 24-bit non-mux 24-bit inputs
TV NTSC/PAL output support in the following modes:
   - Interlaced and non-interlaced outputs
   - Composite
   - S-video
   - Simultaneous S-video and composite YUV output
5-line vertical filtering and overscan compensation
Support for both 800 x 600 and 640 x 840
Optional Macrovision 7.0 protection supporting NTSC and PAL
10-bit DACs for superior picture quality
VMI compatible input mode for DVD playback
Serial programming interface
8 automatic configuration modes using a single register write
Master/slave video operation support using an on-chip PLL
Luma bandwidth of 6 MHz
TV connected register flag
Programmable power-down mode
3.3V operation with 5V tolerant IOs
80-pin PQFP package

	CX25871 Obsolescence Notice
	Adaptive Flicker Filter

Conexant’s CX25870/871 is specifically designed to meet TV outsystem 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, true international television display (NTSC, PAL and SECAM output), and resolutions from 320 x 200 to 1024 x 768. The CX25870/871 supports all features of the market’s most popular PC video encoder, Bt868/869, including 5-line vertical and horizontal flicker filtering, overscan compensation and 10-bit DACs.

International Support
The CX25870/871 provides the most complete support for products with TV out capability shipped into international markets. Support for SCART and WSS 16:9 (wide screen signalling) per EIAJ CPR-1204 and ITU-R BT.119 are now built in. The CX25870/871 provides support of 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).

HDTV Output Mode
HDTV is the wave of the future. Consumers are beginning to purchase their first HDTV sets. With the start of this television set transition, TV out capability must now include the ability to connect and display PC, set-top box and game console content on these new HDTV television sets.

Adaptive Flicker Filtering
The CX25870/871 provides Conexant’s unique adaptive flicker filtering capability. This feature gives new meaning to the words "end-user ease of use" by providing the ability to automatically determine the optimal amount of flicker filtering for a given application. Now, 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). The CX25870/871 does this automatically, even when two applications are being run simultaneously that require different amounts of flicker filtering. The CX25870/871 adjusts the flicker filtering of the given content on a pixel-by-pixel basis to bring the user’s viewing experience to a whole new level.

Auto Configuration Modes
The CX25870/871 offers enhanced auto configuration mode functionality. A total of 48 different modes are now available which provide pre-programmed register settings for at least 95% of typical TV out settings. For example, PAL-M can be autoconfigured 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 CX25870/871 full-register readback capability has been added to provide a real time-to-market advantage for manufacturers as they develop new products, only a big screen television can provide. The PC encoder is a highly-sophisticated chip that converts the high-resolution progressive scan 2D/3D VGA image generated by a PC's graphics subsystem into a format that can be displayed on an interlaced television. This conversion should include "flicker filtering" because if you were to directly display a VGA image on a TV set, the image would "flicker" due to the reduced resolution of the TV set compared to a VGA monitor. Only the Conexant family of 5-line vertical and horizontal flicker filter and adaptive flicker filter PC video encoders provide the crisp video quality that allows the family PC to be at the centre of home entertainment and productivity.

Features
Adaptive flicker filtering for enhanced image and text sharpness
Supports any input resolution from 320 x 200 to 1024 x 768
48 automatic configuration modes
Programmable power management
Pin- and software-forward compatibility with the Bt868/869
SCART support (R/G/B, 4th DAC=CVBS)
Up to 5-line vertical and horizontal flicker filtering
WSS 16:9 (wide screen signalling) support
Macrovision 7.1.L1 protection with the CX25871
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
   - 24-bit 4:4:4 non-multiplexed 24-bit input
   - Alternate 24-bit 4:4:4 non-multiplexed 24-bit input
RGB non-interlaced input to interlaced output
   - 15/16-bit multiplexed 8-bit input
   - 24-bit multiplexed 12-bit input
   - 16-bit non-multiplexed 16-bit input
   - 24-bit non-multiplexed 24-bit input
   - Alternate 24-bit non-multiplexed 24-bit input
RGB non-interlaced input to RGB non-interlaced output
   - 15/16-bit multiplexed 8-bit input
   - 24-bit multiplexed 12-bit input
   - 24-bit non-multiplexed 24-bit input
RGB or YCrCb interlaced input to interlaced output
   - CCIR656
   - CCIR601/DVD
   - VESA VIP
80-pin PQFP package

CX25872/CX25873

	CX25872/CX25873 Product Brief
	Encoder Concept Photo

High Performance 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).

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™ Support
The CX25873 provides Macrovision 7.1.L1 copy protection.

Features
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, CX25875
SCART
5-line vertical and horizontal flicker filtering
WSS 16:9 (wide screen signalling) 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 output
RGB non-interlaced input to RGB non-interlaced output
   - 15/16-bit multiplexed 8-bit input
   - 24-bit multiplexed 12-bit output
RGB or YCrCb interlaced input to interlaced output
   - CCIR656
   - CCIR601/DVD
   - VESA VIP
64-pin TQFP

Applications
Desktop PCs
Graphic cards
Notebook computers
Game consoles
Digital television receiver cards
Living room PCs
Internet PCs
Progressive DVD players
Set-top boxes

	Adaptive Flicker Filtering Conexants unique adaptive flicker filtering capability is a feature of the CX25872/3 and CX25874/5. With AFF the chip looks at pixel content characteristics and automatically determines the optimal amount of flicker filtering for any given application. Now both text based applications and DVD movies can look great at the same time.

CX25874/CX25875

	CX25874/CX25875 Product Brief
	Encoder Concept Photo

International Support
The CX25874 and CX25875 provide the most complete support for products with TV-out functionality shipped to the U.S. and international markets. The CX25874 and CX25875 support SCART and Wide Screen.

Pixel Input Formats and Timing
The CX25874 and CX25875 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.

Automatic Configuration Modes
The CX25874 and CX25875 offer enhanced automatic 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.

CGMS Support
The CX25874 and CX25875 support the complete CGMS set of standards. This includes 480i, 480p/525p, 720p/750p and 1080i/1125i.

Overscan Compensation
The CX25874 and CX25875 support overscan ratios as low as 0% (truly to the bezel of the TV) and as high as 25% (25% of the screen will be black).

Macrovision™ Support
The CX25874 and CX25875 Macrovision 7.1.L1 copy protection and Macrovision 525/625p specification compliance.

Features
HDTV output
CGMS support
Adaptive flicker filtering for enhanced image and text sharpness
5-line vertical and horizontal flicker filtering
Supports any input resolution from 320 x 200 to 1024 x 768
48 automatic configuration modes
Programmable power management
Software-forward compatibility with the CX25870 and CX25871
Pin compatibility with the CX25872 and CX25873
SCART
WSS 16:9 (wide screen signalling) support
Macrovision 7.1.L1 copy protection (CX25875 only)
525p/625p specification compliance (CX25875 only)
10-bit DACs for superior picture quality
Overscan compensation ratios from 0 to 25%
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 output
RGB non-interlaced input to RGB non-interlaced output
   - 15/16-bit multiplexed 8-bit input
   - 24-bit multiplexed 12-bit output
RGB or YCrCb interlaced input to interlaced output
   - CCIR656
   - CCIR601/DVD
   - VESA VIP
64-pin TQFP

CX25874/CX25875 Product Brief

Compliant with the Digital Visual Interface (DVI) industry specification, the CX25894/5/6 family of high performance, single-chip transmitters offers single or dual link output. Supporting up to two independent concurrent channels and two serial interfaces, this device is well suited for desktop PCs and digital TV product applications where integrated core logic and graphics are used. High-bandwidth Digital-Content Protection (HDCP) was developed to protect digital entertainment content that uses the DVI interface. HDCP encrypts the transmission of digital content between the video source, or transmitter -- such as a computer, DVD player or set-top box - and the digital display, or receiver - such as a monitor, television or projector. Once authentication is established, the transmitter encrypts the data and sends it to the receiver for decryption.

• Two independent channels (CX25895/6)
• Low, mid and high-end solutions for a variety of customer needs
• Lowest cost solution, lowest component count, less layout space
• HDCP copy protection
• Dual link DVI output capable to 1920 x 1080
• Compatible with other DVI receivers, DVI 1.0 compliant
• Programmable impodance matching to work with marginal or non-compliant receivers

CX25874/CX25875 Product Brief

The CX25890/1/2 is a high performance, single-chip device that combines a Digital Visual Interface (DVI) transmitter with a TV out encoder - each operating independently of one another. The combination device can be used in a variety of notebook and desktop PCs as well as consumer appliance applications such as set-top boxes and DVD players. TV and video editing applications are well suited for the CX25890/1/2, and today's graphics chips typically provide two ports, giving you the ability to connect up to two different output devices. Download photos from your digital camera onto your PC - assemble a slide show - edit images and add captions - see your results on the TV at the same time you're editing on a PC! Or, operate two TVs off of one set-top box (one flat panel and one traditional analogue TV).

• Single chip DVI transmitter and TV out solution
• Simultaneous DVI and TV output
• Low, mid and high-end solutions for a variety of customer needs
• Lowest cost solution
• Lowest external component count
• Less layout
  space
• Highest performance TV out technology including HDTV output (CX25891/2 only)
• Adaptive flicker filtering and TV out
• Register forward compatibility from earlier generation encoders