Conexant 公司的CX20562是帶有硬件回聲消除DSP的片上揚聲器系統(tǒng)(SPOC)音頻單片解決方案,集成了數(shù)字/音頻處理器,音頻CODEC和D類放大器,極大地改善了音頻質(zhì)量,廣泛應(yīng)用在全合一的PC揚聲器,MP3播放器,USB VoIP免提,內(nèi)置揚聲器和免提的LCD監(jiān)視器,筆記本電腦船塢站以及嵌入USB音頻.本文介紹了CX20562的主要性能,方框圖和接口方框圖以及CX20562-EVK評估板的主要性能和應(yīng)用.
CX20562 USB Speakers-on-a-Chip with Hardware Acoustic Echo Cancellation DSP
The CX20562 is the world’s first family of Speakers-on-a-Chip (SPoC) solutions that integrate the functionality of a digital/voice processor, audio Codec and Class-D amplifier in one cost-effective 48-pin Quad Flat-No Lead (QFN) package. Conexant has leveraged its expertise in voice, audio and IP solutions to deliver technical innovations that dramatically improve audio quality, such as BrightSound™, a Conexant-developed sound processing algorithm. The chipset is optimized with stereo, high fidelity 24-bit DAC for music rendering, built-in echo-free speakerphone with wideband Acoustic Echo Cancellation (AEC) and a noise-reduction hardware Digital Signal Processor (DSP). The high quality music speaker and voice speakerphone is made possible with the latest advances in all-CMOS mixed-signal and DSP integration. The SPoC turnkey solution eliminates the need for a multiple-chip reference design, and makes it easy and cost-effective for manufacturers to design convergence products for high definition audio and voice applications.
CX20562主要特性:
Wideband Acoustic Echo Cancellation DSP engine exceeding TIA 920 requirement
Integrated 1.2 W Class-D amplifier featuring non-clipping, filter-less output with selectable gains
High fidelity 24-bit, stereo DAC -44.1, 48 kHz sampling rate
Wideband 16-bit, stereo ADC -44.1, 48 kHz sampling rate
USB 2.0 full speed compliant
Auxiliary line in input with jack sense
Music-On-Hold
Aux Fade-in/ Fade-out
DSP Array Microphone (VM Central PC host software required)
BrightSound (VM Central PC host software required)
IM launch (VM Central PC host software required)
Integrated stereo headphones driver with jack sense
Stereo Mic input with Bias
On-chip one-time programmable memory for storing 20 characters of product description and DSP tuning parameters
Analog volume control
Digital volume up/down control
Mic Mute
Speaker Mute
On hook/ off hook control
Key pad interface, up to 24 keys
Interface to controller LCD display
Mic Boost 10, 20, 30, 40 dB
USB bus powered 5V, 500 mA or external powered option
48-pin QFN
CX20562主要應(yīng)用:
All-in-One PC speakers, MP3 player dock, speakerphone
USB VoIP speakerphone
LCD monitor with built-in speakers and speakerphone
Notebook PC docking station
Embedded USB audio applications
圖1. CX20562方框圖
圖2. CX20562接口方框圖
CX20562-EVK評估板
Conexant’s CX20562-EVK evaluation kit contains everything to design convergence products for today’s high definition audio and voice applications.
The CX20562 is the first Speakers-on-a-Chip (SPoC) single chip solution with a hardware Acoustic Echo Cancellation (AEC) Digital Signal Processor (DSP).
The chip provides superior audio and voice performance and USB bus powered or external powered option.
The CX20562 has the highest level of Bill of Materials (BOM) integration of Class-D amplifier, USB CODEC, and DSP (No NV-RAM required).
CX20562-EVK評估板主要特性：
Wideband Acoustic Echo Cancellation DSP engine exceeding TIA 920 requirement
Integrated 1.2 W Class-D amplifier, higher output reference design available
24-bit DAC/ 16-bit ADC
USB 2.0 full speed compliant
Auxiliary line in input with jack sense
Music-On-Hold
Aux Fade-in/ Fade-out
DSP Array Microphone
BrightSound
USB bus powered or external powered option
CX20562-EVK評估板主要應(yīng)用:
All-in-One PC speakers, MP3 player dock, speakerphone
USB VoIP speakerphone
LCD monitor with built-in speakers and speakerphone
Notebook PC docking station
Embedded USB audio applications
CX20562-EVK評估板包括:
Evaluation Kit and Software CD Content
Reference Board - CX-9Z-NR0193-00
Datasheet - DO-428988-DS-2
Schematic - SCH-NR0193-00, BOM-NR0193-00
Layout - G600Z-NR0193-01 (4-layer board)
Layout - G600Z-NR0193-02 (2-layer board)
Subwoofer Schematic - CX-9Z-NR0193-SUB
5-Watt Amplifier Schematic - CX-9Z-NRO193-EXTAMP
AEC Turning via One-Time Programmable (OTP) Document - APP-NOTE5
Electromagnetic Interference (EMI) Filtering Recommendation APP-NOTE2
USB OTP Programming Tool - APP-NOTE1
Microphone Installation Guidelines - APP-NOTE4
Human Interface Devices (HID) Document - APP-NOTE3
Driver, VM Central Software CD, and Software Development Kit
3. CX20562-EVK評估板外形圖 |
