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Cirrus公司的CS470xx系列是新一代音频系统级芯片(ASOC)32位处理器,每秒的乘法运算(MAC/S)为300,000,000,目标应用在高保真对成本敏感的设计。该系列集成了S/PDIF Rx, S/ PDIF Tx,模拟输入,模拟输出和取样速率转换器(SRC),能简化系统设计和降低系统总成本。主要应用在汽车音响,DTV,MP3坞站,AVR和DVD Rx, DSP控制的扬声器(条形音箱,低音扩音箱)。本文介绍了CS470xx系列主要特性, CS47048方框图, CDB47xxxD主板和子板方框图以及详细电路图。
The CS470xx family is a new generation of audio system-on-a-chip (ASOC) processors targeted at high fidelity, cost sensitive designs. The CS470xx simplifies system design and reduces total system cost by integrating the S/PDIF Rx, S/ PDIF Tx, analog inputs, analog outputs, and sample rate converters (SRCs)。 For example, a hardware SRC can down-sample a 192 kHz S/PDIF stream to a lower Fs to reduce memory and MIPS requirements for processing. This integration effectively reduces the chip count from 3 to 1, which allows smaller, less expensive board designs. The CS470xx is programmed using the simple yet powerful Cirrus proprietary DSP Composer™ GUI development and pre-production tuning tool. Processing chains can be designed using a drag-and-drop interface to utilize functional macro audio DSP primitives and custom audio filtering blocks. The end result is a software image that is downloaded to the DSP via the serial control port. The Cirrus Framework™ programming environment offers Assembly and C language compilers and other software development tools for porting existing code to the CS470xx family platform. The CS470xx is available in a 100-pin LQFP package with exposed pad for better thermal characteristics. Both Commercial (0℃ to +70℃) and Automotive (–40℃ to +85℃) temperature grades are available. CS470xx系列主要特性: Cost-effective, High-performance 32-bit DSP 300,000,000 MAC/S (multiply accumulates per second) Dual MAC cycles per clock 72-bit accumulators are the highest precision in the industry 32K x 32-bit SRAM with three 2K blocks assignable to either Y data or program memory Integrated DAC and ADC Functionality 8 Channels of DAC output: 108dB DR, –98 dB THD+N 4 Channels of ADC input: 105dB DR, –98 dB THD+N Integrated 5:1 analog mux feeds one stereo ADC Configurable Serial Audio Inputs and Outputs Integrated 192 kHz S/PDIF Rx Integrated 192 kHz S/PDIF Tx Supports 32-bit serial data @ 192 kHz Supports 32-bit audio sample I/O between DSP chips TDM I/O modes Supports Different Sample Rates (Fs) Three integrated hardware SRC blocks Output can be master or slave Supports dual-domain Fs on S/PDIF vs. I²S inputs DSP Tool Set with Private Keys Protect Customer IP Integrated Clock Manager/PLL Flexibility to operate from internal PLL, external crystal, external oscillator Input Fs Auto Detection with μC Acknowledgement Host Control and Boot via I²C™ or SPI™ Serial Interface Configurable GPIOs and External Interrupt Input 1.8V Core and a 3.3V I/O that is tolerant to 5V input Low-power Mode CS470xx系列目标应用: Automotive head units and outboard amplifiers Automotive processors and automotive integration hubs Digital TV MP3 docking stations AVR and DVD Rx DSP controlled speakers (subwoofers, sound bars) 20120216114033550.gif 图1.CS47048方框图 20120216114039128.gif 图2.CDB47xxxD-DCxx开发板外形图 20120216114039128.gif 图3.CDB47xxxD主板方框图 20120216114039710.gif 图4.CDB47xxx-DC48子板方框图 2012021611404060.gif 图5.CDB47xxD差分板方框图 20120216114041640.gif 图6.CDB47xxD(差分)子板连接器 20120216114041468.gif 图7.CDB47xxD(差分)数字音频控制连接器 20120216114042505.gif 图8.CDB47xxD(差分)数字串行闪存 20120216114047183.gif 图9.CDB47xxD(差分)麦克风前置放大器 20120216114047183.gif 图10.CDB47xxD(差分)电源连接器 20120216114050479.gif 图11.CDB47xxD(差分)ADC滤波器 20120216114050479.gif 图12.CDB47xxD(差分)电压输出电路 2012021611405146.gif 图13.CDB47xxD(差分)MCU卡接口 2012021611405238.gif 图14.CDB47xxD(差分)MCU卡电路 20120216114052125.gif 图15.CDB47xxD(差分)MCU卡用户接口 20120216114057565.gif 图16. CDB47xxx-DC48子板框图 20120216114058989.gif 图17. CDB47xxx-DC48子板电路图 详情请见: CS470xx_F1[1].pdf(384.88 KB)2012-2-16 18:48 上传 -1 和 CDB470xx_UM_DB6[1].pdf(2.88 MB)2012-2-16 18:49 上传 -1 |
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