techwell integrated four audio adcs and one audio dac provides multi-channel audio mixed analog output supports a standard i2s interface for record output and playback input 8/16 bit audio word length sample audio with 8/16khz www.intersil.com techwell target applications target applications featuresfeatures the tw2835 has four high quality ntsc/pal video decoders, dual color display controllers and dual video encoders. the tw2835 contains four built-in analog anti-aliasing filters, four 10bit analog-to-digital converters, and proprietary digital gain/clamp controller, high quality y/c separator to reduce cross-noise and high performance free scaler. four built-in motion, blind and night detectors can increase the feature of security system. the tw2835 has flexible video display/record/playback controller including basic display and mux functions. the tw2835 also has excellent graphic overlay function that displays bitmap for osd, single box, 2d array box, and mouse pointer. the built-in channel id codec allows auto decoding and displaying during playback and the additional scaler on the playback supports multi-cropping function of the same field or frame image. the tw2835 contains two video encoders with three 10bit digital-to-analog converters to provide 2 composite or s-video. the tw2835 also includes audio codec that has four audio analog-to-digital converters and one digital-to-analog converter. a built-in audio controller can generate digital outputs for recording/mixing and accepts digital input for playback. the tw2835 can be extended up to 8/16 channel video controller using chip tw28355 analog quad/mux system 4/8/16 channel dvr system car rear vision system hair shop system dental care system 4 channel video and audio controller for security applications accepts all ntsc(m/n/4.43) / pal(b/d/g/h/i/k/l/m/n/60) standards with auto detection integrated four video analog anti-aliasing filters and 10 bit cmos adcs high performance adaptive 4h comb filters for all ntsc/pal standards if compensation filter for improvement of color demodulation color transient improvement (cti) automatic white peak control programmable hue, saturation, contrast, brightness and sharpness high performance horizontal and vertical scaler for each path including playback input fast video locking system for non-realtime application four built-in motion detectors with 16x12 cells and blind and night detectors additional digital input for playback with itu-r bt.656 standard auto cropping / strobe for playback input with channel id decoder supports four channel full d1 record mode to-chip cascade connection. four video decoders dual video controllers support full triplex function with 4ch live, 4ch playback display and 4ch record output analog/digital channel id codec for record and playback application support adaptive median filter for record supports pseudo 8 channel and/or dual page mode horizontal/vertical mirroring for each channel last image captured when video-loss detected auto sequence switch with 128 queues and/or manual switch by interrupt for record path channel skip in auto sequence switch for record path when video-loss detected image enhancement for zoomed or still image in display path high performance 2x zoom to horizontal and vertical direction for display path extendable up to 8/16 channel video controller using cascade connection quad mux switch with 32 queues and/or manual control by interrupt for record path 64 color bitmap osd overlay with 720x480 in ntsc / 720x588 resolution in pal four programmable single boxes and four 2d arrayed boxes overlay mouse pointer overlay dual video encoders dual path digital outputs with itu-r bt.656 standard dual path analog outputs with all analog ntsc/pal standards programmable bandwidth of luminance and chrominance signal for each path three 10bit video cmos dacs audio codec
t ech w ell 5 5 3 8 2 w t 4 c hannel v ideo and a udio c ontr oller f or s ecurit y a pplications t w2835 block diagr am ? 2006 intersil americas inc. all rights reserved. the following are trademarks or registered trademarks of intersil americas inc.: intersil, intersil logo, ?i? and design. all other trademarks are the property of the respective trademark owners. www .intersil.com mpp interface host interface irq interface clock generator clkmpp1 clkmpp2 clkvdox clkvdoy decimation filter decimation filter decimation filter decimation filter interpolation filter i2s interface adc adc adc adc dac ain0 ain1 ain2 ain3 aout video decoder video decoder video decoder video decoder dual scaler dual scaler dual scaler dual scaler motion detect motion detect motion detect motion detect adc adc adc adc mux mux mux mux vin0a vin0b vin1a vin1b vin2a vin2b vin3a vin3b itu-r bt656 decoder channel id decoder playback path control auto-crop & multi-scaler pbclk pbin 8x8 matrix 4x4 matrix dlinki/mpp1/2 hspb/hcsb0,1/hale hrdb/hwrb/hdat irq clk54i write/ read control display path process record path process encoder timing interface video encoder ii itu-r bt656 encoder video encoder ii dac dac vaoyx vaocx vdox vdoy dac vaoyy hsenc vsenc fldenc hlinki vlinki dlinki addr/ba/rasb/casb/wenb/dqm/data
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