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Single-Chip Video Decoder CX25836/7

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Single-Chip Video Decoder CX25836/7 Convergence Video Video Encoders/Decoders Single-Chip Video Decoder CX25836/7 High Performance in a Small Package Conexant’s broadband communications portfolio includes a comprehensive suite of semiconductor solutions that enable the digital home and information network. The CX25836/7 is Conexant’s fourth-generation video decoding solution. It provides a highly integrated single-chip analog video capture solution ideal for a wide range of digital video systems applications. The CX25836/7 features, although applicable to a wide range of analog video applications, are focused on both the security and consumer electronics markets. Most notably, CX25836’s fast camera locking capabilities and flexible programmable inputs make it most suitable for the security camera market. The CX25837, with its ability to decode Composite Video Baseband Signal (CVBS), S-Video, and YPbPr, is best suited to address the wide array of consumer electronics requirements. Both devices are distinguished by high quality, flexibility, integration, and ease of use. Both fit into a wide array of applications: set-top-boxes, flat panel displays (such as LCD and Plasma TVs), Distinguishing Features HDTVs, and PVRs/DVRs. • Integrated NTSC/PAL/SECAM video decoding High Quality • Auto detection and configuration The CX25836/7 integrates two high-performance 10-bit ADCs and provides a for video full 10-bit data path through the video decoder to maintain optimum end-to- end video quality. Eight video inputs provide flexible analog muxing that can • Two 10 bit A/D be configured for any of the following: • YPbPr component video input • Eight CVBS inputs • Ease of Use • Four Y/C inputs • 12mm X 12mm 80-pin TQFP • Three composite with one Y/C and one YPbPr • One composite with two Y/C and one YPbPr • 7mm X 7mm 64-pin TQFP • Two composite with two YPbPr (CX25837 only) • CCIR 656/601/VIP The CX25837 uses its high quality Analog-to-Digital Converter (ADC) to • Integrated anti-alias filter sample the YPbPr video format, which is most often found on prosumer • On-chip voltage regulator (intermediate to advanced end user) type equipment. Simultaneous digitization of Pb and Pr, through the 10-bit chrominance A/D, is used to offer this feature cost effectively yet yield the highest quality. Part Number CX25836/7 Description Single-Chip Video Decoder Convergence Video Video Encoders/Decoders Integrated Filters Flexible Architecture All video inputs have integrated anti-alias filters, eliminating the With eight programmable input ports and a configurable output need for external filter components. These filters help improve the port for 4:2:2 digital, the CX25836/7 can be used to capture video decoding process by removing aliasing artifacts prior to the video from TV tuners, DVD players, video cameras, VCRs, game digitization process. consoles, or any other sources of composite Y/C or component (480i) video. The CX25836/7 video inputs can be programmed Conexant also employs a proprietary method of luma/chroma for up to eight video sources; a maximum of eight CVBS input separation of the composite video sources. Conceptually similar channels. Each of these inputs can be used to support CVBS, to a 4H adaptive chrominance comb filter used for NTSC and S-Video, or component video inputs. The total number and PAL, Conexant performs a slight twist to provide unparalleled configuration of video inputs is user-defined. performance. Through the use of adaptive correlation logic, the resulting combed image provides improved performance over Ease of Use a standard 4H comb solution. In the case where no correlation The CX25836/7 requires minimal programming for startup. These exists between lines, the decoder automatically falls back to the devices are preconfigured in a default mode for development, chrominance band-pass and luma notch filter. verification, and fast prototyping. Additionally, the CX25836/7 can auto detect all worldwide broadcast video standards. In the case of SECAM, a bell filter is implemented. The net effect of the various filtering stages results in a high-quality image with Internally, the CX25836/7 uses on-chip logic to determine reduced cross-chrominance and cross-luminance artifacts (such which video standard is present and reconfigures automatically as dot crawl, hanging dots, rainbow effects) and thus restores full so no user intervention is necessary. This is especially useful bandwidth to luminance data from composite sources. in geographic regions where different video standards may be received on a channel-by-channel basis. However, like the operation of traditional video decoders where the user chooses a specific video standard, the automatic detection feature may be turned off. XTI Master PIXCLK Clock XTO Video Input VID_DATA[7:0] VBI Data Slicer and Decoder Output Port: VRESET/PRGM3 HRESET/PRGM2 CVBS1/Y1 BT.656, BT.601, FIELD/PRGM1 CVBS2/Y2 VIP 2.0 DVALID/PRGM0 10-Bit IR_RX/PRGM5 CVBS3/Y3 CVBS/ I/O Pin Video LUMA MUX IR_TX/PRGM6 ADC Decoder - Arbitrary NTSC, PAL, Horizontal SER_CLK/HAD[0] CVBS4/Y4/SIF1/Pb SECAM and Vertical 2-Wire with 4H Multi-tap Serial SER_DATA/HAD[1] CVBS5/C1/SIF2/Pb Adaptive Polyphase Command 10-Bit Comb Scaler or CHIP_SEL/VIPCLK CVBS6/C2/SIF3/Pb Chroma/ Filter VIP Host HCTL/PRGM3 Sound IF I/F IRQ_N/PRGM4 ADC CVBS7/C3/SIF4/Pr Audio Over - Input MUX, Anti-alias Filter and AGC Sample or CVBS8/C4/SIF5/Pr PLL_CLK/PRGM7 Generic Clock CX25836/7 System Block Diagram Superior Performance Moreover, the surrounding Bill of Materials (BOM) has been The CX25836/7 high quality video decoder offers superior integrated and optimized for performance and overall cost performance through advances in technology, integration, effectiveness. Together, small package and integration yield and patented intellectual property. high performance in a small package. To maximize the customer’s flexibility and minimize the board space by eliminating multiple For example, a new and improved arbitrary horizontal and foot print options, the CX25837 is also offered in an 80-pin vertical scaler, from full resolution down to an 8:1 ratio (icon 12x12 mm device, which is pin-for-pin compatible with the size), has been implemented using a polyphase interpolation CX25840/1/2/3 broadcast A/V decoder. Broadcast audio can be filter. This maintains a high-quality scaled image that preserves added by a mere device change. Finally, the CX25836/7 has multiple the detail and aspect ratio of the source material. Scaling can be power-down modes to address low-power applications and power accomplished in both ITU-R BT.656 and square formats. budget-sensitive designs. The video decoder is designed on the latest sub-micron process, which reduces the overall power Additionally, new advances in clamping, Automatic Gain Control consumption through the advantages of reduced geometries. (AGC), and DC restore circuitry allow for faster lock times upon channel change and improved signal reconstruction abilities to improve the video decode process. The CX25836/7 is offered in a compact 64-pin 7x7 mm TQFP and operates off of a single 3.3 V regulator. Part Ordering Numbers 6 Video 8 Video Component VIP Part Input Input Video Host Number Mux Mux Input Port CX25836 X CX25837 X X X XTO XTI VSS_XTAL VSS_CH2 CVBS8/C4SIF5/Pr2 VAA_CH2 CVBS8/C3/SIF4/Pr1 S2D_NEG2 CVBS6/C2/SIF3 IREF CVBS5/C1/SIF2/Pb2 VSS_CH1 CVBS4/Y4/SIF1/Pb1 VAA_CH1 CVBS3/Y3 NC NC NC NC VAA_XTAL 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 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 TEST 1 60 CVBS2/Y2 TEST 1 48 CVBS2/Y2 RESET_N 2 59 S2D_NEG1 RESET_N 2 47 S2D_NEG1 SLEEP 3 58 CVBS1/Y1 SLEEP 3 46 CVBS1/Y1 NC 4 57 ASUB NC 5 56 VAA_ADC1 IR_TX/PRGM6 4 45 ASUB NC 6 55 VSS_ADC1 IR_RX/PRGM5 5 44 VAA_ADC1 NC 7 54 VSS_ADC2 IRQ_N/PRGM4 6 43 VSS_ADC1 IR_TX/PRGM6 8 53 VAA_ADC2 VDDO 7 42 VSS_ADC2 IR_RX/PRGM5 9 80-Pin TQFP 52 REG_OUT VSSO 8 64-Pin TQFP 41 VAA_ADC2 IRQ_N/PRGM4 10 12 x 12 x 1 mm Body Size 51 REF_IN VSS 9 7 x 7 x 1 mm Body Size 40 REG_OUT VDDO 11 0.5 mm Pin Pitch 50 VSS_PLL 0.4 mm Pin Pitch VSSO 12 49 VPP0 VDD 10 39 REG_IN VSS 13 48 VPP1 SER_DATA/HAD[1] 11 38 VSS_PLL VDD 14 47 VDDO_PLL SER_CLK/HAD[0] 12 37 VPP0 SER_DATA/HAD[1] 15 46 PLL_CLK/PRGM7 CHIP_SEL/VIPCLK 13 36 VPP1 SER_CLK/HAD[0] 16 45 VSSO_PLL VRESET/HCTL/PRGM3 14 35 VDDO_PLL CHIP_SEL/VIPCLK 17 44 NC VSS 15 34 PLL_CLK/PRGM7 VRESET/HCTL/PRGM3 18 43 NC VSS 19 42 NC VDD 16 33 VSS0_PLL VDD 20 41 NC 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 0 1 2 0 1 2 NC NC NC NC VSS VDD VSS VDD VSSO VSSO VDDO VDDO PIXCLK PIXCLK VID_DATA[7] VID_DATA[6] VID_DATA[5] VID_DATA[4] VID_DATA[3] VID_DATA[2] VID_DATA[1] VID_DATA[0] FILD/PRGM VID_DATA[7] VID_DATA[6] VID_DATA[5] VID_DATA[4] VID_DATA[3] VID_DATA[2] VID_DATA[1] VID_DATA[0] FIELD/PGRM DVALID/PRGM DVALID/PRGM HRESET/PRGM HRESET/PRGM CX25837 and CX25836 Pinout (64-Pin) CX25837 Pinout (80-Pin) Convergence Video Video Encoders/Decoders CX25836/7 Features • Auto detection and configuration • Auxiliary clock output – For providing an oversampled of NTSC/PAL/SECAM video audio clock locked to the video or for use as a general • Worldwide video standards – NTSC (M, J, 4.43), PAL purpose PLL output (B, D, G, H, I, M, N, Nc), SECAM (K, L) • Infrared transmit and receive logic • Full 10-Bit ADCs and data path • Internal voltage regulation for single supply operation • Flexible video input mux with integrated
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