DRAFT CX2070x USB/I2S Audio CODEC ImagingSmart™ Product Brief USB/I2S Audio CODEC, AudioVoice DSP, Stereo Class-D, Headphone Driver PC speakers system LCD display/soundbar Home automation/intercom PND/PMP Multimedia IP phone Telepresence/Unified Communication device Embedded applications Key Features • Four-wire and five-wire digital audio I/O (I2S/PCM/ SPDIF) that supports full-duplex independent sampling rates and a master clock for an optional PCM/I2S slave CODEC (S/PDIF-in available in CX20709-21Z) • One two-wire I2C and one four-wire SPI slave interface for an external MCU USB 2.0 compliant full-speed UAC interface Single-ended or differential line output • • System Block Diagram LINE_IN_1L_LP (SE or Diff Line In) M LINE_IN_2L_LN (SE or Diff Line In) M MIC_IN2_L/LINE_IN_3L M LINE_IN_1R_RP (SE or Diff Line In) M LINE_IN_2R_RN (SE or Diff Line In) M Σ ADC Σ ADC M MIC_IN2_R/LINE_IN_3R DMA L DMIC_IN DMIC_CLK Conexant Confidential • www.conexant.com • 037PBR00 KS1 KS0 GPO4 KS2 NVDAT NVCLK UART_TX UART_RX UART I2C_EN/MCLK SPI_MISO I2C_SPI_CSN I2C_SDA/SPI_MOSI I2C_SPI_SCL PASS_THRU MON ADC SPI I2C Slave USB I2S_PCM_2_TX_DAT I2S_PCM_2_CLK/DMIC_CLK I2S_PCM_2_RX_DAT/DMIC_IN/SPDIF_IN PASS_THRU I2S_PCM_2_WS PCM/I2S I2S_PCM_1_TX_DAT I2S_PCM_1_CLK Jack Sense PCM/I2S MCLK I2S_PCM_1_RX_WS SENSE_A Clock Circuitry CLASSD_RP CLASSD_RN (2.5W Class-D 4 Ω Out) LINE_OUT_LP LINE_OUT_LN (SE or Diff, LINE_OUT_LN 10 kΩ line) LINE_OUT_RP LINE_OUT_RN (SE or Diff, LINE_OUT_LN 10 kΩ line) DMA I2S_PCM_1_RX_DAT XTLI XTLO HP_OUT_R (Capless HP Out 32 Ω) Controller Bias Generator I2S_PCM_1_TX_WS/SPDIF_OUT MICBIAS_L HP_OUT_L (Capless HP Out 32 Ω) DAC CLASSD_LP CLASSD_LN (2.5W Class-D 4 Ω Out) GPO3 ADC GPO2 MIC_IN_R GPO 1 ADC MICBIAS_R DAC DSP X2 MIC_IN_L R The on-chip DSP is designed to run a suite of VPAs and audio post processing effects offered by Conexant. The device features Conexant's soundbar algorithm for USB 5.1 channel soundbar enhancement. The audio designer has the ability to adjust and optimize performance on the target system by using the SPoC configuration toolbox. MONO_OUT_P (SE or Diff, 600 Ω or 10 kΩ line) MONO_OUT_N (SE or Diff, 600 Ω or 10 kΩ line) DAC DMA Memory GPO 0 The device integrates three high-performance 102dB SNR, 24-bit DACs for 2.1CH speaker output, capless headphone output, and single-ended/differential lineoutput. The analog input paths feature four high performance, 24-bit ADCs supporting up to four microphones or three stereo line-inputs. Different audio sampling rates ranging from 8kHz to 96kHz are generated directly from the master clock without the need for an external PLL. The power-efficient integrated class-D stereo amplifier operates at 5V or 3.3V with an optional maximum power of 2.8W at a 4 load. For an intercom application, the mono line-out supports 600 drivers that can drive the isolation transformer directly without an external operational amplifier. • • • • • • • USB_DP The CX20709 offers multiple digital data and control I/Os for flexible peripheral or MCU/MPU connectivity. The device features one four-wire and one five-wire digital audio interface, which can be mixed or multiplexed to support bi-directional I2S, PCM, and S/PDIF. The device can be controlled and configured by both read and write capabilities through I2C and SPI. The device features a USB 2.0 compliant audio class interface (full-speed for data and control) and a UART interface for the external MCU/MPU interface. Applications USB_DM The CX20709 is one of Conexant's audio/voice DSP CODEC family solutions with highly-integrated hardware DSP, CODEC, class-D amplifier, USB, I2S, S/PDIF, and I2C interfaces. The solution features a suite of turnkey audio and voice enhancement algorithms designed for convergence audio entertainment and voice communication applications, such as PC docking system/soundbars, portable multimedia/navigation devices, Smart home intercom systems, media IP phones, and Unified Communication peripherals. The CX20709 operates at supply voltages down to 3.3V for analog, and 1.8V for the digital core. An advanced power management scheme can be configured to achieve <7.55mW in sleep mode. USB_5VDET Product Overview Volume VOLT_MON DRAFT CX2070x USB/I2S Audio CODEC | ImagingSmart™ Product Brief Additional Features • • • • • • • • Supports dual USB playback endpoints (available in CX2070921Z) Stereo digital microphone, up to a 12MHz clock rate (available in CX20709-21Z) Eight GPIO pins 2.8W x 2 BTL filterless stereo class-D speaker amplifier—Low EMI class-D amplifier output with spread spectrum and common mode scrambler Integrated 50mW headphone driver with jack sense Separate mixed mono line-output for sub-woofer or intercom usage Three single-ended stereo or one differential stereo analog audio inputs Up to four microphone interfaces with on-chip bias supply (available in CX20709-21Z) • • • • • • • 24-bit DAC/ADC, SNR 102dB, THD–92dB at 48kHz 3.3V—In DSP mode, the processing limits the input and output to a 16-bit effective resolution Audio sample rates of 8kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz, 88.2kHz, and 96kHz 90dB dynamic range with 0.1% THD+n at a 4 load 12-bit ADC multiplexed to support analog volume potentiometer and DC level detection Flexible power management Variable master clock rates Configurable on-chip proprietary voice/audio processing – Sub-band AEC – Dual microphone beam forming – Noise reduction – – – • Dynamic loudness adaptor Microphone AGC Sub-band line echo cancellation (two-way intercom applications) – Digital equalizer (10 bands/ channel) – Dynamic range compression – Fourth order digital crossover for subwoofer line-out – Conexant soundbar algorithm for USB 5.1 channel soundbar enhancement (available in CX20709-21Z) SPoC configuration toolbox – Fast configuration through USB-to-I2C from a PC – Data path, I/O setup, and DSP parameter adjustment – Output log for convenient MCU programming Ordering Information Ordering Part Number Part Number DSAC-L709-21CH CX20709-21Z Description USB/I DSAC-L709-12CH CX20709-12Z Conexant does not recommended this part number for new designs. 76QFN CX20709-EVK2 CX20709 EVK2 CX20709-21Z EVK - CX20709-EVK2-IN CX20709 EVK2 IN CX20709-21Z Intercom Daughterboard - 2S Audio Package CODEC 76QFN Note: All devices are lead-free (Pb-free) and RoHS compliant. www.conexant.com Headquarters: 1901 Main Street, Suite 300 Irvine, CA,92614 General Information: U.S. and Canada: 888-855-4562 | International: 1 + 949-483-3000 © 2014 Conexant Systems, Inc. All rights reserved. 037PBR00