放大器" title="放大器">放大器" title="放大器">放大器,汽车处理器,DTV,MP3坞站,AVR和DVD RX, DSP控制的扬声器.本文介绍了CS470xx 系列主要特性,方框图,CDB47xxxS主板方框图,电路图与主要元件, CDB47xxx-DC48子板方框图,电路图与主要元件.

The CS470xx DSP is designed to provide high-performance post-processing and mixing of analog and digital audio. Dual clock domains are supported when the DAI and SPDIF RX inputs are used together. Integrated sample rate converters (SRCs) allow audio streams with different sample rates to be mixed. The low-power standby preserves battery life for applications that are always on, but not necessarily processing audio, such as automotive audio systems.

The CS470xx family is a new generation of audio system-on-a-chip (ASOC) processors targeted at high fidelity, cost sensitive designs. Derived from the highly successful CS48500 32-bit fixed-point audio enhancement processor family, the CS470xx further simplifies system design and reduces total system cost by integrating the S/PDIF Rx, S/PDIF Tx, analog inputs, analog outputs, and 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.

CS470xx 系列典型应用:

 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)

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 place/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 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°C to +70°C) and Automotive (–40℃ to +贴片电感 85℃) temperature grades.

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 24-bit DAC output: 108dB DR, –98 dB THD+N

 4† Channels of 24-bit ADC input: 105dB DR, –98 dB THD+N

 Integrated 5:1 analog mux feeds one stereo ADC

 Configurable Se一体成型贴片电感rial 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 w/ 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

图1.CS47048方框图

图2.CDB47xxxS-DCxx开发套件外形图

图3.CDB47xxxS主板方框图

图4.CDB47xxx-DC48子板方框图
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