CX20873 dolby headphone decoder ic features ? high speed usb2.0 device, supporting up to eight endpoint ? quad digital microphone pdm interface ? spdif transmitter and spdif receiver ? full duplex stereo i 2 s/pcm ? six 32-bit timers/counters ? serial peripheral interface (spi) master and slave ? inter-integrated circuit (i 2 c) master and slave ? 1 uart interface ? dedicated peripheral and memory-to- memory dmas ? interrupt controller ? 13 flexios fully programmable through pic processor ? 2 sets of tri-color pwm led drivers ? 6 dedicated general-purpose i/os (gpios), ? debug/jtag interface and on chip logic analyzer ? on-chip programmable plls ? advanced power management allowing usb suspend mode to meet 2.3 ma using off chip converter 5v/3.3 v ? package 116p dual row qfn firmware features ? conexant proprietary algorithms available for voice and audio processing ? supports integration of 3rd party algorithms e.g. dolby digital plus decoder, dolby headphone, dolby prologic, speech recognition and synthesis applications usb headset, usb headphones, docks & soundbar, gaming consoles, dvd players, automotive, dsp off load applications in ultrabooks, ultrathins, and more part number CX20873 description dolby headphone decoder ic overview the CX20873 device family from conexant provides a turnkey dolby headphone and headset solution for customers. cone xant provides opti mized implementation of dolby digital plus decoder, dolby headphone, and dolby prologic ii algorithms (royalties applicable). dolby headphone technology allows users to simulate a highly realistic 5.1/7.1 surround sound listening environment from stereo transducer headphones. CX20873 allows users to combines dolby headphone technology with either pro logic iix or pro logic iiz processing while simultaneously decoding multi-channel encoded streams received from an external source over spdif or a usb 2.0 interface. CX20873 provides a similar turnkey solution for headset customers and includes conexant voice processing algorithms coupled with the dolby algorithms. the conexant vpa offers advanced in-band microphone noise reduction, 3d sound effects, sub-band acoustic echo cancellati on, and automatic gain control features. a configuration toolbox allows for fast configuration of the various signal processing algorithms and optimizes performance. block diagram pmc dcdc plls dmas timers ocla usb2.0 hs spi master i2c master uart i2c/spi slave pic, gpio, pwm spdif tx spdif rx quad dig. mic / pdm i2s/pcm 32 bit dsp (cape) x y p p sram/rom x sram/rom y sram/rom jtag bridge
electrical characteristics ordering guide parameter minimum nominal maximum unit comments 1.0 v supply voltage -0.4 1.02 v vdd, psup_1v0, vdd_sw 1.8 v supply voltage -0.4 1.98 v vddo_1, vddo_3, vddo_4. vddo_5, vddo_6, vddo_7 3.3 supply voltage -0.4 3.60 v vdda3v3, vddo_1, vddo_3, vddo_4,vddo_5, vddo_6, vddo_7, psup3v3 storage temperature range -40 150 o c non-operating temperature operating temperature range -40 85 o c temperature -40 27 125 o c junction temperature ordering number part number descriptin package tbd CX20873-11z dolby headset decoder ic 9x9 mm 2 drqfn ? 2012 conexant systems, inc. all rights reserved. conexant and the conexant logo are registered trademarks of conexant systems, inc. all 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 merchant ability, fitness for a paparticular purpose and non-infringement. conexant shall not be liable for any special, indirect, incidental or consequential damages as a result of its use. www.conexant.com general information: u.s. and canada: (888) 855-4562 international: 1+ (949) 483-3000 headquarters 4000 macarthur blvd. newport beach, ca 92660 doc# pbr-203109
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