《電子技術(shù)應(yīng)用》
您所在的位置:首頁 > 模擬設(shè)計 > 解決方案 > CirrusCS470xx高性能模擬和數(shù)字音頻處理解決方案

CirrusCS470xx高性能模擬和數(shù)字音頻處理解決方案

2012-07-31
</a>放大器" title="放大器">放大器" title="放大器">放大器,汽車處理器,DTV,MP3塢站,AVR和DVD RX, DSP控制的揚(yáng)聲器.本文介紹了CS470xx 系列主要特性,方框圖,CDB47xxxS主板方框圖,電路圖與主要元件, CDB47xxx-DC48子板方框圖,電路圖與主要元件.

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 系列典型應(yīng)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 +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 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 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

圖1.CS47048方框圖

圖2.CDB47xxxS-DCxx開發(fā)套件外形圖

圖3.CDB47xxxS主板方框圖

圖4.CDB47xxx-DC48子板方框圖

圖5.CDB47xxx-DC28子板方框圖

圖6.CDB47xxxS (單端)主板外形圖:頂視圖

圖6 CDB47xxxS (單端)主板對應(yīng)的元件:

1. +9V Power In

2. Optical S/PDIF Out

3. Coax S/PDIF Out

4. Optical S/PDIF In

5. Coax S/PDIF In

6. +5V Header

7. Line-Level Analog Outputs

8. CDB47xxS-DC48 Daughtercard Connectors

9. Mic Input

10. Single-Ended Line-Level Inputs

11. MCU Rotary Encoder

12. MCU Buttons

13. SPI Flash

14. I2C EEPROM

15. LCD

16. DSP DAO Header

17. IR Receiver

18. Board Reset

19. MCU Programming Header

20. MCU Control Bypass Header

21. USB Connector

22. DSP External Control Header

23. DSP DAI Header

24. +1.8V Header

25. Power LEDs (4)

26. + 3.3V Header

圖7.CDB47xxx-DC48 子板外形圖:頂視圖

圖7 CDB47xxx-DC48 子板歲對應(yīng)的元件:

1. Cirrus Logic CS47048 DSP

2. Power LEDs (2)

3. MCLK-XTAL_OUT Header

4. DSP GPIO Button

5. DSP GPIO LED

6. DSP GPIO LED

7. DSP GPIO Switch

8. +1.8VD Probe Point

9. +3.3VD Probe Point

10. +1.8VA Probe Point

11. +3.3VA Probe Point

圖8.CDB47xxxS (單端)子板連接器電路圖

圖9.CDB47xxxS (單端)數(shù)字音頻控制連接器電路圖

圖10.CDB47xxxS (單端)串行存儲器電路圖

圖11.CDB47xxxS (單端)麥克風(fēng)前置放大器電路圖

圖12.CDB47xxxS (單端)電源連接器電路圖

圖13.CDB47xxxS (單端)ADC濾波器電路圖

圖14.CDB47xxxS (單端)DAC濾波器電路圖

圖15.CDB47xxxS (單端)MCU卡接口電路圖

圖16.CDB47xxxS (單端)MCU卡用戶接口電路圖(1)

圖17.CDB47xxxS (單端)MCU卡用戶接口電路圖(2)

圖18.CDB47xxx-DC48子板框圖

圖19.CDB47xxx-DC48子板電路圖
詳情請見:
http://www.cirrus.com/en/pubs/proDatasheet/CS470xx_PP8.pdf



本站內(nèi)容除特別聲明的原創(chuàng)文章之外,轉(zhuǎn)載內(nèi)容只為傳遞更多信息,并不代表本網(wǎng)站贊同其觀點(diǎn),。轉(zhuǎn)載的所有的文章、圖片,、音/視頻文件等資料的版權(quán)歸版權(quán)所有權(quán)人所有。本站采用的非本站原創(chuàng)文章及圖片等內(nèi)容無法一一聯(lián)系確認(rèn)版權(quán)者,。如涉及作品內(nèi)容,、版權(quán)和其它問題,請及時通過電子郵件或電話通知我們,,以便迅速采取適當(dāng)措施,,避免給雙方造成不必要的經(jīng)濟(jì)損失,。聯(lián)系電話:010-82306118,;郵箱:[email protected]