Texas Instruments PurePath CC85XXDK, PurePath CC85XXDK-HEADSET User Manual
CC85XXDK-HEADSET User’s Guide
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Table of Contents
1 INTRODUCTION .................................................................................................................... 3
2 ABOUT THIS MANUAL .......................................................................................................... 3
3 ABBREVATIONS ................................................................................................................... 4
4 PUREPATH WIRELESS HEADSET KIT OVERVIEW ............................................................ 5
5 GETTIN G STA R TE D WI TH THE PUREPATH WIRELESS HEADSET KIT ............................ 7
6 HARDWARE OVERVIEW ...................................................................................................... 9
6.1 TLV320AIC3204 CODEC .............................................................................................. 10
6.2 POWER SUPPLY AND CHARGING OF LI-ION BATTERY ........................................... 10
6.3 CC2590 RANGE EXTENDER ........................................................................................ 10
6.4 BUTTONS AND LEDS ................................................................................................... 11
6.5 RF PERFORMANCE ..................................................................................................... 11
6.6 PROGRAMMING CONNECTOR ................................................................................... 12
6.7 TEST SIGNALS AVAILABLE ON P7 ............................................................................. 12
7 REFERENCES ..................................................................................................................... 14
8 DOCUMENT HISTORY ........................................................................................................ 15
APPENDIX A: CC85XX HEADSET SCHEMATIC ........................................................................ 16
APPENDIX B: CC85XX HEADSET COMPONENTS PLACEMENT ............................................. 20
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1 Introduction
Thank you for purchasing the PurePath Wireless Headset Kit (CC85XXDK-HEADSET).
The CC85xx devices are Texas Instrument’s wireless audio SoCs for the 2.4 G Hz unlicensed ISM
band. Upon the release of the PurePath Wireless Headset Kit only the CC8520 and CC8530 is
released to the market, the subsequent devices in the CC85xx family will be released in the future.
For the CC85xx family roadmap, please see the PurePath Wireless Audio page [1].
This CC85xx family offers state-of-the-art co-existence and robustness, excellent link budget and
low power operation while streaming high-quality audio wirelessly. The CC8520 product f older on
the web [6] has more information, with datasheets, user guides and application notes.
The PurePath Wireless Headset Kit includes all the necessary hardware to evaluate, demonstrate,
prototype and develop analog input and output applications, as well as U SB applications with the
CC85xx. T he main parts in the kit are the t wo CC85xx Headset boards. The hardware included in
the kit has the potential to demonstrate complete headset
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2 About This Manual
functionality. However, firmware to
support bi-directional audio is not yet ready upon the release of this kit. Please see the product
folder for all the supported features.
This manual describes PurePath Wireless Headset Kit in detail, and points the user to other useful
information sources.
Chapter 4 briefly describes the contents of the kit. Chapter 5 gives a quick introduction to how to
get started with the kit. Chapter 6 describes the hardware in the kit. Appendix A and B includes
schematics of the hardware and the component placement for the kit.
The CC85XXDK-HEADSET Quick Start Guide [2] has a short tutorial on how to use the kit with its
out-of-the-box settings. This document is delivered within the kit box.
For more details about the CC85xx devices, see the CC85xx Family User’s Guide [5].
Please visit the CC85XXDK-HEADSET web page [10] and CC8520 product page [6] for additional
information. T he complete production material i.e., schematics, BOM, gerber files etc. can also be
found in CC85XXDK-HEADSET-RD web page [11].
Further information and support can be found on the TI LPRF Online Community [12]. Also see
chapter 7 for a list of additional relevant documents and links.
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Texas Instruments differentiates between the applications “headset” and “headphone”, the first being
bidirectional with both headphones and microphone, and the latter being unidirectional with audio streaming
in only one direction (no microphone).
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3 Abbrevations
DAC
Digital-to-Analog Converter
HID
Human Interface Device
I2C
Inter-Integrated Circuit
ISM
Industrial, Scientific and Medical
LDO
Low-Dropout Regulator
LED
Light Emitting Diode
LNA
Low-Noise Amplifier
PA
Power Amplifier
PCB
Printed Circuit Board
SNR
Signal-to-Noise Ratio
SoC
System-on-Chip
THD+N
Total Harmonic Distort ion + Noise
USB Universal Serial Bus
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4 PurePath Wireless Headset Kit Overview
The main purpose of the PurePath Wireless Headset Kit is letting the user evaluate complete
headphone and headset functionality with the CC85xx devices. The CC85xx Headset board is a
low cost and low power reference design for a state-of-the-art wireless headphone/headset. The kit
can also be used to demonstrate simple cable replacement applications. Finally it has a USB micro
connector for evaluation of USB applications, however firmware with USB support is not yet
available upon the release of this kit.
The development kit can be used through all stages of development of applications with CC85xx:
• Evaluate CC85xx RF performance and range testing with the onboard inverted-F PCB
antenna
• Test wireless sound quality. The onboard codec is the TLV320AIC3204 [3]
• Interface to analog input and output (3.5 mm mini-jack)
• Interface to USB audio and USB HID on the protocol master
• Support for programming interface with the PurePath Wireless Configurator PC software [4]
Figure 1 shows the main components of the PurePath Wireless Headset Kit.
• 2 pcs CC85xx Headset boards
• 2 pcs 1.72Wh (3.7V, 465mAh) Li-ion batteries
• 1 pcs CC Debugger [7], used to program the CC8531 onboard the CC85xx Headset
boards, or in an end customer application
Figure 1. The main components included in the PurePath Wireless Headset Kit.
Also included in the kit is:
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• 1 USB micro cable for charging the Li-ion battery and for powering the CC85xx Headset
boards.
• 1 audio cable (3.5mm jack to 3.5mm jack) to be used at the analog input.
• Documentation
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5 Getting Started With the PurePath Wireless Headset Kit
The CC85xx Headset boards are pre-programmed in produc tion. This pre-programmed firmware
can be found in the example project “CC85XXDK-HEADSET Preloaded Demo” in the PurePath
Wireless Configurator [4]. The boards are labeled with MASTER and SLAVE stickers, and
instructions on how to pair them and start the audio streaming can be found in the CC85XXDKHEADSET Quick Start Guide [2]. Please note that when purchasing CC85xx devices they com e
un-programmed from production.
Figure 2 shows the main components of the CC85xx Headset board.
Figure 2. Photo of the CC85xx Headset board
The pre-programmed firmware on the two CC85xx Headset boards demonstrates a stereo input
base station (labeled MASTER) streaming audio to a stereo headphone (labeled SLAVE). The
main features of this pre-programmed application are:
• Uncompressed audio (PCM16)
• 44.1 kHz sample rate
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