Samsung WSN720S User Manual

WSN720S

Version 1.0

Samsung Electronics

page 1 of 9

User Manual

1. Product Description

The WSN720S module is a wireless audio module based on the Microchip DARR83. This module can used to

build an uncompressed wireless digital audio transceiver operating in the 2.4GHz, 5.2GHz and 5.8GHz bands.

The wireless audio link supports up to two stereo audio streams and comes together with additional features

such as: data encryption, pairing functionality, bi-directional control data messages, low power audio snooze

mode, WLAN detection and Automatic Frequency Allocation. The DARR83 chip itself provides the basic

functions of Audio Processing and buffering, Data Link Layer and Physical Layer. The WSN720S module

integrates all functionality for a wireless digital and analog audio connection, comprising the below features:

 DARR83 Wireless Audio Processor
 2.4GHz/ 5.2GHz/ 5.8 GHz RF Transceiver
 Embedded Antennas – dual antenna
 One TX transmitter and antenna diversity receiver (not simultaneous TX transmission)
 Digital audio interfaces (I2S)
 Integrated 24 bit stereo Audio DAC + Headphone AMP
 Integrated 16 bit Audio ADC + Microphone AMP
 Built-in SPI interface Flash
 24 pins interface connector for power, audio output, control interface and GPIOs
 Regulated 5V supply

2. Functions & Features

High Quality Audio

 Up to four stereo audio channels, fully bidirectional, up to 24-bit/96 kbps uncompressed audio
 Low latency<20ms for real-time audio and lip sync
 Low latency compression algorithm – optimized for voice applications, headphones
 Inter-speaker synchronization; Low-jitter audio clock sync
 Programmable digital audio gain

Networking and Connectivity

 22Mbps Bandwidth in 2.4G, 5.2GHz and 5.8 GHz Bands
 In-room or multi-room network topology
 Point-to-Point and Point-to-Multipoint
 Bidirectional data channel (100 kbps)
 Simple Pairing and Association Function
 4 I2S Data pins, each provided with their own pair of BCK/LRCK signals or stereo S/PDIF

WSN720S

Version 1.0

Samsung Electronics

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input/output

 Master and Slave I2C bus for external control functions

Coexistence and Robustness

 Enhanced robustness against both in and out of band interferers like: WiFi and cordless phones
 Coexistence with 802.11a, b, g and n
 Automatic receiver antenna diversity minimizes fading and multi-path effects
 Link quality monitoring
 Soft audio muting under poor link circumstances

Power Management

 Low power consumption
 Automatic RF output power control
 Power down Duty Cycle mode: If no link established, modules (both TX and RX) will enter power

down mode

Integrated 8052 MCU

The DARR83 integrates an 8052 MCU. This includes the following features:

 45 KByte Code RAM
 8 KByte Data RAM
 4 Timer/Counters
 UART

Digital Audio Clock Synchronization

The digital audio clock synchronization is an additional more cost effective method for synchronization of

audio sample on the receiving side with respect to the transmitted audio samples. The digital clock

synchronization feature works for output audio sample rates of 96 and 48kbps.

Sample Rate Converter (SRC) + Sample Rate Detector

The SRC can handle the following input sample rates [Ksps]:

 44.1
 48
 96
 192(using I2S in slave mode)

WSN720S

Version 1.0

Samsung Electronics

page 3 of 9

Symbol

Parameter

Min

Typ.

Max

Unit

V dc

Supply Voltage

4.5

5.0

5.5

V

I dc

Supply current

- - 450

mA

Temp

Operating Temperature

-20

25

50

℃

Parameter

Min

Typ.

Max

Unit

Modulation

QPSK

TX/RX operating

1 TX transmit /
RX antenna diversity

Bandwidth

22

MHz

RF Band (channel)

2.4GHz (low/mid/high)

2412 (1)

2438 (2)

2464 (3)

MHz

5.2GHz (low/mid/high)

5180 (4)

5210 (5)

5240 (6)

5.8GHz (low/mid/high)

5736 (7)

5762 (8)

5814 (9)

TX Average RF Output Power
(Typical: avg. /peak, TA =
25 °C )

2.4GHz

13.0

15.0

17.0

dBm

5.2GHz

12.0

14.0

16.0

5.8GHz

6.0

8.0

10.0

RX Sensitivity

-82

dBm

Audio Latency

20

ms

3. Product Specification

Product Form Factor

 Module Size (mm): 26.0 (W) X 60.0 (L) X 3.3 (H)
 PCB size (mm): 26.0 (W) X 60.0 (L) X 1.1 (H)
 Shield can (mm): 23.3 (W) X 23.0 (L) X 1.7(H)
 Antenna Type : Dual- PCB Printed Antenna

Operating Contions

RF & Audio Characteristics