CX2077x USB Audio Codec IC with Integrated DSP and Tri-color PWM LED Driver Innovative cost-effective single-chip solution enables superior audio Conexant’s CX2077x is the first USB audio codec Integrated Circuit (IC) product family that incorporates the functionality of a digital audio/ voice processor, USB audio codec, and Tricolor Pulse-Width Modulator (PWM) driver, and digital audio interfaces in one cost-effective, single-chip package. The award-winning Digital Signal Processor (DSP) runs a suite of turnkey audio and voice algorithms that greatly enhances the voice and audio experience. The devices are part of Conexant’s embedded audio solutions and are specifically designed for USB audio peripherals, including headsets, headphones, and microphones. The CX2077x product family includes CX20773, CX20774, and CX20776. The on-chip DSP runs a suite of innovative Conexant proprietary voice processing algorithms and audio post processing effects that dramatically improves sound quality and frees up processing power for other applications without compromising on cost and future firmware scalability. Key audio innovations include Subband Acoustic Echo Cancellation, Dynamic Range Control, Inband Microphone Noise Reduction, 3D, and Microphone Auto Gain Control. Conexant’s innovative CX2077x product family contains an industry-first internal tri-color RGB (red, green, blue) PWM driver and controller. Each LED output contains an 8-bit resolution PWM controller for brightness and dimming control, enabling designers to create differentiated user-friendly products. The onchip RGB PWM significantly reduces the Bill-ofMaterial (BOM) costs. The audio performance is optimized with stereo high fidelity 24-bit DAC. All internal analog circuitry uses differential signaling to guard against noise coupling from interfering RF. The external BOM cost is minimized with internal PLL and headset in-rush circuit. The CX2077x turnkey solutions eliminate the need for a multiple-chip reference design, making it easy and economical for manufacturers to design high-quality audio products. A complete evaluation kit with reference board and all the necessary technical documents and software is available. Key Features Benefits USB Audio Codec with integrated DSP Audio enhancement and optimization for speakers and microphones Tri-color PWM LED Driver Configurable features for product differentiation Advanced Voice and Audio DSP Algorithms Improves audio and voice experience Dual Stereo DMA Endpoints Independent Gaming audio and voice audio control Digital Audio Interfaces Connect to third party digital audio processor CX2077x Features On-Chip Voice//Audio DSP – DSP support for 3D, EQ, NR, AEC, BF,CNG, ST, AGC, and DRC – USB Codex, 2.0 Full Speed Stereo Input, Differential and Singleended Microphone Input Stereo Input, Single-ended for Line-in Stereo Output, Differential and Singleended Line Output Stereo Headphone Driver, Singleended HP Output Dual Stereo DMA End Points PCM/I2S, S/PDIF Digital Audio I/F(s) UART, I2C Stereo DAC/Stereo ADC 8, 16, 24, 32, 44.1, 48 kHz Sampling rate – <100 mA operation for Headset/ Headphone Terminal Type Tri-color (RGB) PWM LED Driver and controller 8-bit 256-step independent and group brightness and dimming control 9kB Controller RAM for firmware extension and plug-in Up to 18 GPIO Volume, Mute, Hook, and LED Infinity rotary wheel control Press-N-Hold button support 4 wires external Co-processor interface (I2S/SPDIF-Out) In-rush Circuit Elimination Circuit for Headset/Headphone applications Stereo Microphone input with hardware boost and bias 35 mW Stereo Headphone driver Jack Sense Interface to controller LCD display 24-button keypad support 48-pin and 64-pin QFN Package Applications Unified Communication USB Headset Skype Super-wideband Headset Entertainment USB Headset/ Headphones Gaming USB Headset USB Microphone CX2077x Product Comparison L M ic In R M ic SE/ M ic In + Boost/ Single Ended/ Differential L HP Out 32 Ω M Boost/ Single Ended/ Differential EQ L Mic SE/ M ic In + ADC M R M ic In - DAC R HP Out 32 Ω SE/DIFF Line Out DMA Memory EQ M L Line In ADC M SE/DIFF Line Out DAC DMA R Line In GPIO LDO Switching Cap Regulator GPIO Fly P Fly N Vcore Filter GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO GPIO EEPR OM D AT TX EEPR OM C LK UART RX PW M LED 2 PW M LED 1 PWM Controller PW M LED 0 I2S/PC M T X SPD IF I2S/PC M R X I2S/PC M W S USB 3.3 V Analog +5 In Controller PCM/I2S I2S/PC M C LK GPIO GPIO Jack Sense U SB- Sense Clock Circuitry U SB+ XT AL In XT AL Out DSP_X2 SPDF MIC Bias 2 Bias Generator LDO 3.3 V Digital MIC Bias 1 CX2077x System Block Diagram Conexant Product Portfolio Conexant’s comprehensive product portfolio includes solutions for imaging, audio, video surveillance, and embedded modem applications. © 2011 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-202763