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Product Brief Conexant CX25840

www.avnet-embedded.eu Convergence Video Video Encoders/Decoders

Single-Chip Broadcast Audio/Video Decoder CX25840/1/2/3

Highly Flexible Single-Chip Video and Broadcast Audio Decoding

Conexant’s broadband communications portfolio includes a comprehensive suite of semiconductor solutions that enable the digital home and information network. The CX25840/1/2/3 is Conexant’s second generation of Audio/Video (A/V) decoders built on the success of the CX23880 family of broadcast A/V PCI decoders. These devices are optimized for the regional broadcast requirements and are pin-to-pin compatible with each other. The CX25840/ 1/2/3 is the smallest integrated stereo broadcast A/V decoder capable of demodulating all of the most common worldwide A/V standards.

The CX25840 with no DBX and CX25841 with DBX support both the North American (BTSC) and Japanese (EIA-J) markets, respectively. The CX25842 supports the European market. And finally, for the customer who wants a single chip to address all worldwide broadcast standards, there is the CX25843. This device provides highly integrated, single-chip analog, A/V Distinguishing Features capture solutions ideal for digital video systems that support worldwide • Auto detection and configuration broadcast analog A/V content. for audio/video

Distinguished by its high quality, flexibility, broadcast audio support, integration, • Worldwide audio standards - BTSC, and ease of use, the CX25840/1/2/3 can be designed into a wide array of EIA-J, A2, NICAM, FM/AM applications, including set-top boxes, flat panel displays, HDTVs, and personal video recorders (PVRs). • Baseband audio support via I2S and AC 97 Highly Integrated • Two 10 bit A/D The CX25840/1/2/3 is highly integrated, and includes anti-aliasing, noise rejection filters, and Automatic Gain Control (AGC) and DC restore circuits. • Component video support Along with worldwide decoding for all common video and broadcast audio standards, processing functions such as high-quality four-lines adaptive • Integrated anti-alias fi lter comb filtering, arbitrary horizontal and 5-tap vertical scaling, hue, brightness, saturation, and contrast controls are also included. The audio path includes • 12mm X 12mm 80-TQFP an automatic volume control function and two assignable stereo processing units for control of volume, three-band equalization, and balance. • 4H adaptive comb

• On-chip voltage regulator The level of audio and video integration provided by the CX25840/1/2/3 removes the need for additional broadcast audio decoding and processing chips or external sound demodulation chips. It also reduces the overall Part Number CX25840/1/2/3 Bill-of-Materials (BOM) for the system developer, without compromising Description Broadcast Audio/Video Decoder audio and video performance. Convergence Video Video Encoders/Decoders

Ease of Use With eight programmable input ports and configurable output The CX25840/1/2/3 can automatically detect, via the use of ports for 4:2:2 digital video and linear PCM audio, the CX25840/ an on-chip microprocessor, all the worldwide broadcast video 1/2/3 can be used to capture video and audio from TV tuners, and audio standards. This automatic detection is particularly DVD players, video cameras, VCRs, game consoles, or any other important in geographic regions where different audio standards source of composite Y/C or component (480i) video. may be received on a channel-by-channel basis. The devices are preconfigured in default mode for development, verification, and Baseband Audio Support fast prototyping and thus require minimal programming for startup. Output flexibility is not limited to video. The CX25840/1/2/3 offers complete support for baseband audio. The audio output Flexible Architecture can be programmed to support interfaces of I2S, VIP, or audio The CX25840/1/2/3 video inputs can be programmed for up over ancillary in the 656 video modes. Additionally, the I2S CLK to eight signal inputs - a maximum of eight Composite Video can act as a Preliminarymaster or slave. Baseband Signal (CVBS) input channels. Each of these inputs can be used to support CVBS, S-Video, component video, or The serial audio interface supports programmable master/slave broadcast audio inputs. The total number and configuration of modes and 16- to 24-bit sample widths. The serial audio input port video and audio inputs is user defined. can supply audio samples from an external, baseband audio codec at 32 kHz, 44.1 kHz, 48 kHz, and 96 kHz.

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CX25840/1/2/3 System Block Diagram Part Ordering Numbers

A2, NICAM, BTSC BTSC Component VIP Worldwide Part FM, AM, (with DBX), EIA-J (without DBX), EIA-J Video Host Audio Decoding Number Audio Decoding Audio Decoding Audio Decoding Input Port CX25840 X X X CX25841 X X X CX25842 X X X PreliminaryCX25843 X X X VDD VSS VSSO VDDO VAA_XTAL XTO XTI VSS_XTAL VSS_CH2 CVBS8/C4/SIF5/Pr2 VAA_CH2 CVBS7/C3/SIF4/Pr1 S2D_NEG2 CVBS6/C2/SIF3 IREF CVBS5/C1/SIF2/Pb2 VSS_CH1 CVBS4/Y4/SIF1/Pb1 VAA_CH1 CVBS3/Y3 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 TEST 1 60 CVBS2/Y2 RESET_N 2 59 S2D_NEG1 SLEEP 3 58 CVBS1/Y1 GPIO[1]/PRGM9 4 57 ASUB VSS 5 56 VAA_ADC1 VDD 6 55 VSS_ADC1 GPIO[0]/PRGM8 7 54 VSS_ADC2 IR_TX/PRGM6 8 53 VAA_ADC2 IR_RX/PRGM5 9 80-Pin TQFP 52 REG_OUT IRQ_N/PRGM4 10 12 x 12 x 1 mm Body Size 51 REG_IN VDDO 11 0.5 mm Pin Pitch 50 VSS_PLL VSSO 12 49 VPP0 VSS 13 48 VPP1 VDD 14 47 VDDO_PLL SER_DATA/HAD[1] 15 46 PLL_CLK/PRGM7 SER_CLK/HAD[0] 16 45 VSSO_PLL CHIP_SEL_VIPCLK 17 44 SA_SDIN VRESET/HCTL/PRGM3 18 43 SA_BCLK_IN VSS 19 42 SA_WCLK_IN VDD 20 41 SA_BCLK_OUT 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 VSS VSS VDD VDD VSSO VDDO PIXCLK SA_SDOUT VID_DATA[3] VID_DATA[2] VID_DATA[1] VID_DATA[0] VID_DATA[7] VID_DATA[6] VID_DATA[5] VID_DATA[4] FIELD/PGRM 1 SA_WCLK_OUT DVALID/PRGM0 HRESET/PRGM2

CX25843, CX25842, CX25841, and CX25840 Pinout Convergence Video Video Encoders/Decoders

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CX25840/1/2/3 Diagram

CX25840/1/2/3 Features

• Auto detection and configuration • Hardware interrupt to eliminate polling of worldwide broadcast A/V standards • Fast locking mode for security camera applications • Worldwide video standards – NTSC (M, J, 4.43), PAL • Auxiliary clock output – For providing an over sample (B, D, G, H, I, M, N, Nc), SECAM (K, L) audio clock locked to the video or for use as a general • Worldwide audio standards – BTSC, EIA-J, A2, purpose PLL output NICAM, FM/AM • Infrared transmit and receive logic • Full 2 10-Bit ADCs and data path • Internal voltage regulation for single supply operation • Flexible video input mux with integrated • Low power anti-alias fi ltering • 80-pin TQFP • Four line adaptive comb fi lter for NTSC and PAL Typical Applications • Flexible video output port - 27 MHz ITU-R BT.656, • Flat panel displays VIP 2, or ITU-R BT.601 video with separate syncs • HDTV • Macrovision detection • TV tuners • Programmable VBI data slicer for data services such • DVD players as closed caption, Teletext, and program guides • Video cameras • Power-up confi gurable two wire serial command • Set-top boxes interface or two wire VIP 1.1/2 host port interface • VCRs and PVRs • Multiple audio outputs – serial audio interface I2S or • Game consoles AC97 or embedded as ancillary data in the video stream • Flexible sample rate conversion on all audio inputs and outputs

© 2003, Conexant Systems, Inc. All Rights Reserved. Conexant and the Conexant www.conexant.com logo are registered trademarks of Conexant Systems, Inc. All other trademarks General Information: are owned by their respective owners. Although Conexant strives for accuracy U.S. and Canada: (800) 854-8099 International: (949) 483-6996 in all its publications, this material may contain errors or omissions and is Headquarters – Newport Beach subject to change without notice. THIS MATERIAL IS PROVIDED AS IS AND WITHOUT 4000 MacArthur Blvd, P.O. Box C ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING MERCHANTABILITY, FITNESS FOR A Newport Beach, CA 92660-3095 PARTICULAR PURPOSE AND NON-INFRINGEMENT. Conexant shall not be liable for any special, indirect, incidental or consequential damages as a result of its use. Order# 102205A

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