CX20709 2 USB/I S Audio CODEC, Audio/Voice DSP, Stereo Class-D, Headphone Driver Overview The on-chip DSP is designed to run a suite The CX20709 is one of Conexant s Audio/ of Voice Processing Algorithms and Audio Voice DSP CODEC family solutions with Post Processing Effects offered by highly integrated hardware DSP, CODEC, 2 Conexant. The device features Conexant s Class-D amplifier, USB, I S, S/PDIF, and 2 soundbar algorithm for USB 5.1 channel I C interfaces. The solution features a suite sound-bar enhancement. The audio of turnkey audio and voice enhancement designer has the ability to adjust and algorithms designed for convergence audio optimize performance on the target system entertainment and voice communication by using the SPoC Configuration Toolbox. applications, such as PC Docking System/ Sound-Bar, Portable Multimedia/Navigation The CX20709 operates at supply voltages Devices, Smart Home Intercom System, down to 3.3 V for analog and 1.8 V for the Media IP Phone, and Unified digital core. An advanced power Communication Peripherals. management scheme can be configured to achieve <7.55 mW in sleep mode. The CX20709 offers multiple digital data and control I/O for flexible peripheral or MCU/ MPU connectivity. The device Applications features one 4-wire and one 5-wire digital audio interface, which can be mixed or PC Speakers System 2 multiplexed to support bi-directional I S, LCD Display/SoundBar PCM, and S/PDIF. The device can be Home Automation/Intercom controlled and configured by both read and PND/PMP 2 write capability through I C and SPI. The Multi Media IP Phone device features a USB 2.0 Compliant Audio Telepresence/Unified Communication Class interface (full-speed for data and Device control) and a UART interface for the Embedded Applications external MCU/MPU interface. The device integrates three high- performance 102 dB SNR, 24-bit DACs for 2.1CH speaker output, capless headphone Ordering output, and single-ended/differential line- Part Number Package Description output. The analog input paths feature four Number high performance, 24-bit ADC supporting up DSAC-L709-21CH CX20709-21Z 76QFN to four microphones or three stereo Line- Inputs. Different audio sampling rates DSAC-L709-12CH CX20709-12Z 76QFN Not recommended for new design ranging from 8 kHz to 96 kHz are generated directly from the master clock without the CX20709-EVK2 CX20709-EVK2 CX20709-21Z Evaluation Kit need for external PLL. The power-efficient integrated Class-D stereo amplifier operates CX20709-EVK2-IN CX20709-EVK2-IN CX20709-21Z Intercom Daughter Board at 5 V or 3.3 V with an optional maximum power of 2.8 W at a 4 load. For intercom All devices are lead-free (Pb Free) and RoHS compliant application, the mono line-out supports 600 drivers, which can drive the isolation transformer directly without an external operational amplifier. Part Number CX20709 2 Description USB/I S Audio CODEC, Au- dio/Voice DSP, Stereo Class-D, Headphone Driver Dual Microphone Beam Forming Separate mixed mono line-output for CODEC Features Noise Reduction sub-woofer or intercom usage Dynamic Loudness Adaptor 2 Three single-ended stereo or one 4-wire and 5-wire digital audio I/O (I S/ Microphone Automatic Gain differential stereo analog audio input PCM/SPDIF), supporting full duplex Control Up to 4 microphone interfaces with on- independent sampling rates, master Subband Line Echo Cancellation 2 chip bias supply (available in clock for optional PCM/I S slave codec (2-way intercom applications) CX20709-21Z) (SPDIF-in available in CX20709-21Z) Digital Equalizer (10 bands/ 2 24-bit DAC/ADC, SNR 102 dB, THD - One 2-wire I C and one 4-wire SPI channel) 92 dB at 48 kHz 3.3 V slave interface for external MCU Dynamic Range Compression In DSP mode, the processing will USB 2.0 Compliant full speed UAC 4th Order Digital Crossover for be limited the input and output to Interface Subwoofer Line-out 16-bit effective resolution Supporting dual USB playback end Conexant sound-bar algorithm for Audio sample rate: 8,16, 22.05, 24, 32, points (available in CX20709-21Z) USB 5.1 channel sound-bar 44.1, 48, 88.2, 96 kHz enhancement (available in Stereo Digital Microphone, up to 90 dB Dynamic Range with 0.1% 12 MHz clock rate (available in CX20709-21Z) THD+N at 4 load CX20709-21Z) SPoC Configuration Toolbox 2 12-bit ADC multiplexed to support Eight GPIO pins Fast configuration via USB-to-I C analog volume potentiometer and DC from PC 2.8 W x 2 BTL filter-less stereo Class- level detection D Speaker Amplifier Data path, I/O setup, and DSP Flexible Power Management parameter adjustment Low EMI Class-D amplifier output Variable master clock rates Output log for convenient MCU with Spread Spectrum and programming common mode scrambler Configurable On-Chip proprietary Voice/Audio Processing Integrated 50 mW headphone driver with jack sense Subband Acoustic Echo Cancellation Single-ended or differential line output M LINE IN 1L LP (SE or Diff Line In) (SE or Diff Line In) M LINE IN 2L LN ADC M MIC IN2 L/LINE IN 3L MONO OUT P M LINE IN 1R RP (SE or Diff Line In) (SE or Diff, 600 or 10 k line) DAC MONO OUT N (SE or Diff, 600 or 10 k line) LINE IN 2R RN(SE or Diff Line In) M ADC HP OUT L Memory DMA DAC M (Capless HP Out 32 ) MIC IN2 R/LINE IN 3R DMA HP OUT R L DAC DMIC IN (Capless HP Out 32 ) CLASSD LP CLASSD LN DMIC CLK DSP X2 (2.5W Class-D 4 Out) MIC IN L ADC CLASSD RP CLASSD RN MIC IN R (2.5W Class-D 4 Out) ADC LINE OUT LP LINE OUT LN R (SE or Diff, LINE OUT LN 10 k line) LINE OUT RP LINE OUT RN MICBIAS L (SE or Diff, LINE OUT LN Controller Bias 10 k line) Generator DMA MICBIAS R Volume MON ADC VOLT MON SPI XTLI PCM/I2S PCM/I2S USB UART Clock I2C Slave MCLK Circuitry XTLO Jack SENSE A Sense Functional Block Diagram Conexant Product Portfolio Conexants comprehensive product portfolio includes solutions for imaging, audio, video surveillance, and embedded modem applications. 2012 Conexant Systems, Inc. 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I2S PCM 1 CLK I2S PCM 1 RX WS I2S PCM 1 RX DAT I2S PCM 1 TX WS/SPDIF OUT PASS THRU I2S PCM 1 TX DAT I2S PCM 2 WS PASS THRU I2S PCM 2 CLK/DMIC CLK I2S PCM 2 RX DAT/DMIC IN/SPDIF IN I2S PCM 2 TX DAT GPO 0 USB DP GPO 1 USB DM USB 5VDET GPO2 I2C SPI SCL GPO3 I2C SDA/SPI MOSI GPO4 SPI MISO I2C SPI CSN KS0 I2C EN/MCLK KS1 UART RX KS2 UART TX NVCLK NVDAT