DWHS84 Digital Wireless Headset Reference Design Tri-Band (2.4/5.2/5.8 GHZ) Multi-purpose Headset/Headphone Reference Design

Summary Microchip’s DWHS84 wireless audio reference design is based on our DARR84 audio processor chipset and provides a simple and flexible “go-to-market” headset and headphone application design. The DWHS84 allows for both audio and microphone inputs to process headset/ headphone signals and supports multiple RF bands and frequencies within each RF band (2.4, 5.2 and 5.8 GHz), making it well-suited to effectively manage the interference commonly associated with Wi-Fi®, Bluetooth® and microwave ovens, and other sources. The DWHS84 reference design integrates 1 MB SPI Flash, enabling Microchip’s KleerNet™ technology interoperability platform which allows for connectivity across products and brands. This is accomplished via a software stack offering multiple use cases, making it an excellent low-power headset/headphone solution. Microchip’s distinct Highlights architecture allows for multi-player gaming scenarios ■■ Utilizes the DARR84 highly-integrated for Xbox®, PS3™ and Nintendo® gaming systems. The baseband processor integrated Sample Rate Converter supports multiple audio ■■ Supports two uncompressed stereo audio channels sample rates and the dual PCB antennas provide Tx and ■■ Reference design supports multiple RF bands in a Rx diversity, achieving indoor ranges of approximately 60m “go-to-market”, small-footprint package (2.4 GHz) and 3m (5.8 GHz). The reference design utilizes ■ Automatic Tx and Rx antenna diversity minimizes fading an integrated built-in codec, a headphone amplifier and a ■ and multi-path effects microphone interface, providing a cost-effective solution. ■■ KleerNet technology allows for connectivity across Target Applications products and brands ■■ Gaming and VOIP headsets ■■ Single crystal for radio control, baseband and ■■ Wireless headphones and microphones audio processing ■■ Automotive infotainment systems ■■ Operates on two AAA rechargeable batteries ■■ Wireless rear and standalone speakers ■■ Reference design pre-qualified for compliance with ETSI and FCC regulations ■■ Blu-ray®/DVD/home audio amplifiers/transmitters ■ Multi-function switch enables volume up/down, play, ■ Wireless soundbars and sub-woofers ■ ■ pause and mute functions ■■ Separate switch for pairing ■■ Dedicated LED for active link indication

Key Features Benefits Facilitates quick and easy design-in, enabling shorter development cycles “Go-to-market” solution and faster time-to-market Integrated codec, ADC, DAC, HPA, microphone interface Allows for very high level of integration while reducing system cost Low power consumption Enables headsets to operate on two AAA batteries Superior Wi-F®i co-location and co-existence Minimizes the impact of Wi-Fi on audio and data throughput Supports point to multi-point audio Allows multiple receivers to listen to the same audio stream Reference design supports dual PCB antennas BOM cost savings Uncompressed bit-true audio transmissions Zero impact on quality under normal wireless conditions Complies with Dolby® certification requirements required for gaming Low-latency audio transfer; default at <20 ms headsets and systems Pre-certified reference design comes with pre-defined Enables faster development cycle and time-to-market easily customizable software What is KleerNet?

Gaming Desktop Speakers

TV

In-Home Blu-ray™ Entertainment PC Disc Player

Headphone and Patio/Deck Headsets Entertainment

■ Open interoperability with multiple consumer electronic brands ■ High-quality, wireless audio streaming from content-rich sources such as PC, TV and mobile platforms ■ Higher quality audio streaming compared to Bluetooth and Wi-Fi ■ Robust link and automatic network confi guration for ease of use DWHS84 Block Diagram

vcc REG

Spk-L Audio Rx Spk-R DAC/ Audio MAC Diplexer Mic ADC RF Transceiver

Tx Rx-IQ GPIOs Diplexer MCU DWHS84 PHY Tx-IQ

Flash Xtal

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Information subject to change. The Microchip name and logo and the Microchip logo are registered trademarks and KleerNet is a trademark of Microchip Technology Incorporated in the U.S.A. and other countries. All other trademarks mentioned herein are property of their respective companies. © 2013, Microchip Technology Incorporated. All Rights Reserved. Printed in the U.S.A. 12/13 DS00001633A