Audio Speakers-on-a-Chip Evaluation Kit Speakers-on-a-Chip with On-Chip Voice/Audio DSP, Integrated I2S/USB Codec, and PWM Class-D Amplifier CX20709-EVK Evaluation Kit USB I2C Conexant's portfolio includes a comprehensive suite of semiconductor solutions for communications and consumer applications. The CX20709-EVK provides developers with a USB-based reference board and PC-based software Toolbox for comprehensive evaluation of the following Conexant Speakers-on-a-Chip (SPoC) devices: CX20702, CX20703, CX20704, CX20705, CX20706, CX20707 and CX20709. The reference board features the CX20709 device with the proprietary on-chip Digital Signal Processor (DSP), Codec, Class-D/PWM (Pulse Width Modulator) driver, USB, and I2S and I2C interfaces for designing voice and music convergence applications such as All-In-One Speakers/Docking systems, Portable Multimedia/ Navigation Devices, Smart Home Intercom System, and Unified Communication Peripherals. The device also features multiple high performance 24-bit DACs and ADCs, capless headphone output, support for mono and array microphones, and a range of digital and analog input/output channel selections for flexible routing and mixing. The DSP hardware runs a suite of voice processing algorithms and audio post processing effects offered by Conexant that dramatically improves sound quality and frees-up processing power for other applications. The CX20709 evaluation kit contains everything for the developer to design convergence audio entertainment and voice communication applications. Distinguishing Features * Three 24-bit DAC/four 24-bit ADC, SNR 102dB, THD - 92dB at 48kHz 3.3V * Configurable on-chip proprietary DSP - Subband acoustic echo suppression and cancellation - Stereo beam forming - Noise reduction - Dynamic loudness adaptor - Mic auto gain control - Subband line echo cancellation (two-way intercom applications) - Digital equalizer (10 bands/channel) - Dynamic range control - 4th Order Digital Crossover for subwoofer line-out - 3D Expander (Phantom mode and Immersion mode) * 4-wires and 5-wires digital audio I/O (I2S/PCM/SPDIF), supporting full duplex independent sampling rates * USB 2.0 Compliant Audio Class Interface (high speed data and control) * One 3-wire I2C or 4-wire SPI slave interface for external MCU * 2.5 W x 2 BTL stereo Class-D speaker amplifier, also configurable as a PWM output for external feedback-less type Class-D amplifier * Flexible power management * Audio sample rate: 8, 11.025, 12, 16, 22.05, 24, 32,44.1, 48, 64, 88.2, 96 kHz (c) 2009 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 merchantability, fitness for a particular 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# EVK-202370 UART Pore 6-Button Keypad USB 5V Power Brick Microphone In Left Microphone In Right Line In I2C 4-Wire PCM Line Out SPDIF Ozmo WiFi PAN Module Headphone PWM/Class-D Output 5-Wire PCM Analog Volume Intercom RJ-11 Evaluation Kit and Software CD Content c Reference Board - CX-9Z-C00303 c Datasheet - DSH-202264 c Schematic - SCH-C00303 c BOM-C00303 c Layout - G600Z- C00303 c Conexant SPoC Configuration Toolbox c EVK User Guide c Firmware upgrade instructions Applications * * * * * * * * * * * All-in-One PC speaker system Multimedia LCD display/sound bar Smart home automation/intercom Docking systems for portable communication/media device Mobile Internet devices/portable navigation devices/ portable media player Multimedia IP phone Telepresence/Unified Communication Device Embedded applications Door phone system Full-duplex hands-free telephony Advanced headset for Unified Communication Part Number CX20709-EVK Description Speakers-on-a-Chip with On-Chip Voice/Audio DSP, Integrated 12S/USB Codec, and PWM Class-D Amplifier 09-2871