摘要：  本文介绍了CC8520 & CC8530主要特性，方框图，应用电路以及无线耳机基本应用框图，主控器工作系统框图和CC85xx 开发套件主要特性和详细电路图。

关键字：  数字音频，  电路，  耳机

TI 公司的CC8520 & CC8530是2.4 GHz RF SoC，是无线数字音频流PurePath平台。用于高质量的数字音频的无线传输，器件内置了无线音频传输协议，可控制所选择的外部设备。本文介绍了CC8520 & CC8530主要特性，方框图，应用电路以及无线耳机基本应用框图，主控器工作系统框图和CC85xx 开发套件主要特性和详细电路图。

2.4 GHz RF SoC FOR WIRELESS DIGITAL AUDIO STREAMING CC8520 & CC8530 - PurePath™ Wireless

The PurePath™ Wireless platform is a cost-effective and low-power solution optimized for wireless transmission of high-quality digital audio.

The CC85xx includes a robust built-in wireless audio transmission protocol and can control selected external audio devices. Utilizing numerous coexistence mechanisms allows the CC85xx to avoid interfering with， or being interfered by other 2.4 GHz radio systems.

The CC85xx operates autonomously， and can be used with or without an external MCU. An external host processor can be connected through SPI and control some aspects of its operation. The CC85xx interfaces easily with other TI audio ICs and DSPs (using I2S and DSP/TDM interfaces). More details can be found in the CC85xx Family User Guide [2].

CC8520 & CC8530主要特性：

应用：

Wireless high-quality digital audio

Wireless point-to-point audio link

Wireless headphones

Wireless loudspeakers

Wireless 2.1 speaker systems

CC8520 supports up to 2 channels

CC8530 supports up to 4 channels

内置音频协议：

CD-quality uncompressed audio

Excellent robustness and co-existence through multiple techniques

Adaptive Frequency Hopping

Forward Error Correction

Buffering and Retransmission

Error Concealment

Optional high quality audio compression

No software development needed when used in autonomous mode

外接系统：

Can be used autonomously， or can be controlled by an external host MCU for greatest flexibility

Seamless connection and control of selected TI audio codecs， DACs/ADCs and digital audio amplifiers using I2S and I2C

图1。CC8520 & CC8530方框图

图2。CC8520/CC8530应用电路

图3。无线耳机基本应用框图

图4。带主控的无线耳机基本应用框图

图5。自治的无线耳机基本应用框图

图6。主控器工作系统框图

CC85xx 开发套件

CC85XXDK will let the user fully evaluate PurePath Wireless technology and the CC8520 for wireless audio applications. Audio interfaces available with the kit include S/PDIF optical + coax input/output， line input/output， headphone output and microphone input. A TLV320AIC3101 audio codec is mounted on the PurePath Wireless Audio Evaluation Board， which also has connectors compatible with other TI Codecs. CC85XXDK works with PurePath Wireless Configurator PC tool which helps designers configure and test PurePath Wireless Audio devices.

CC85xx 开发套件目标应用：

wireless audio signal cable replacement

wireless headphones

wireless subwoofer

Features

PurePath 无线CC85xxDK开发套件包括：

2 x PurePath Wireless Audio Evaluation Boards

2 x CC85XXEM RF Evaluation Modules

2 x CC85XX-CC2590EM RF Evaluation Modules

2 x 2.4GHz antennas

1 x CC Debugger

2 x Mini USB cable

1 x Mini Jack to RCA male audio cable

1 x RCA male to RCA male audio cable

Documentation

Either a CC85XXEM or a CC85XX-CC2590EM RF Evaluation Board can be plugged onto the PurePath Wireless Audio Evaluation B

图7。CC85xx 开发套件外形图

图8。CC85xx 开发套件电路图(1)

图9。CC85xx 开发套件电路图(2)

图10。CC85xx 开发套件电路图(3)

图11。CC85xx 开发套件电路图(4)

图12。CC85xx 开发套件电路图(5)

图13。CC85xx 开发套件电路图(6)