Samsung WSM520V User Manual

1. Introduction

The WSM520V module is a wireless audio module based on the AV5100. The AV5100 is a 5GHz wireless audio SoC (System-on-chip), optimized for building point-to-multi-point digital wireless audio solutions such as wireless subwoofers, wireless rear speakers, and in-home theater systems. The AV5100 contains all the necessary radio transceiver and digital baseband circuitry to form a complete digital wireless node without the need for external processing.

The WSM520V can be powered from a +5V supply input, and the AV5100 contains all the necessary power management and analog circuitry needed to operate the chip.

The WSM520V can operate in the upper bands (5725~5825MHz) of the 5GHz spectrum, enabling worldwide coverage.

2. Feature

• Product form factor
  • Module Size (mm): 40.0 (W) X 26.0 (L) X 3.0 (H)
  • PCB size (mm): 40.0 (W) X 26.0 (L) x 1.0 (H)
  • Shield can (mm): 24.7 (W) X 21.9 (L) X 2.0(H)
  • Antenna Type: PCB Printed Antenna
• Complete VMX wireless audio comm. system
• 5.725-5.825 GHz RF operation
• 96dB SNR
• Multiple OTA audio configuration
• Low, fixed latency (<20ms)
• Separate RF transmit and receive RF I/O
• RX diversity
• USB digital audio capability
• I2S digital audio capability
• Complete power management
• 24pin I/O connector

3. Block Diagram

The Block diagram of WSM520V module is shown below.

WSM520V_Block Diagram

The diagram shows the WSM520V module connected to various components including a 24-pin FPC connector, AV5100 IC, flash memory, LDO, RF components (filters, power amp, switch), and two printed antennas.

Key connections and components include:

• 24-pin FPC Connector
• AV5100 IC (Wireless Audio SoC)
• MX25L2006EM1I-12G (2M-BIT SPI Serial Flash)
• AX6607 (LDO)
• RF components: HHM1732B1 (Balun Filter), HWS5037 (Power AMP), DPDT SW
• Printed ANT 0 and Printed ANT 1 for 5725-5825 MHz operation
• XTAL (16MHz)

WSM520V block diagram

• PCB Antenna 0: 5725~5825MHz
• PCB Antenna 1: 5725~5825MHz
• X-TAL: 16MHz

4. Functional Diagram

The functional diagrams of WSM520V module are shown below. The WSM520V can provide wireless audio service in applications with wireless subwoofer solutions and wireless 2.1 solutions.

Wireless Subwoofer Solution Diagram

This diagram illustrates a wireless subwoofer system. A Soundbar containing a DSP and MCU communicates wirelessly with a Subwoofer. The Soundbar acts as the 'Arbiter', managing the wireless connection. The Subwoofer receives audio via a 'Client' component, which includes I2C and I2S interfaces, and an Amplifier (AMP) driving a speaker. The audio is described as Mono, 96dB, 5KHz.

Wireless 2.1 Solution Diagram

This diagram shows a wireless 2.1 audio system. A Soundbar, containing DSP and MCU, communicates wirelessly with both Rear speakers and a Subwoofer. The Soundbar acts as the 'Arbiter'. The Rear speakers and Subwoofer each have a 'Client' component that receives audio via I2C and I2S interfaces, connected to an Amplifier (AMP) driving a speaker. The audio for the Soundbar is Stereo, 96dB, 20KHz, while the audio for the Subwoofer is Mono, 96dB, 5KHz.

5. Operating Conditions

6. RF Characteristics

7. Transmit mode

In transmit mode, the audio engine transforms the audio data into packetized digital IQ signals. These are in turn pulse-shaped before conversion by DAC to match the analog IQ inputs of the radio transceiver. The radio transceiver has a programmable baseband filter to lower the RF spectrum side lobes and to suppress the DAC image and the DAC spurious. The output power is programmable. A power detector (PD_Out) on the radio transceiver enables close-loop TX power control. The differential RF TX DA outputs are connected via a balun filter to a Power amplifier and the amplified TX carrier signal is radiated by a printed antenna in the module after going through a Transmit/Receive switch placed between the power amplifier and the printed antenna.

8. Receive mode

In receive mode, antenna diversity is supported. The single-ended output of the T/R switch is connected to the differential RF LNA inputs in the AV5100 through a balun filter. Filtering and amplification are all performed by the radio transceiver function in the AV5100. The gain setting is controlled by BB. The analog IQ outputs are sampled by the BB having a dual-channel ADC to convert. The received data is demodulated and fed to the audio processing engine controlling the audio function.

9. Clock

The main crystal is connected to the AV5100 IC. The clock frequency is 16MHz and it feeds the AV5100.

10. I/O interface

The WSM520V module has a 24-pin FPC connector for I/O interface. The 24-pin connector is configured as the following table:

11. Notice

FCC Statement

This device complies with Part 15 of FCC Rules. Operation is subject to the following two conditions:

1. This device may not cause harmful interference, and
2. This device must accept any interference received, including interference that causes undesired operation.

Caution: Any changes or modifications to the equipment not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

This equipment has been tested and found to comply within the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.

This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna
• Increase the separation between the equipment and receiver
• Connect the equipment into an outlet on a different circuit from that to which the receiver is connected
• Consult the dealer or an experienced radio/TV technician for help.

This device and its antenna(s) must not be co-located or operation in conjunction with any other antenna or transmitter.

IMPORTANT NOTE:

FCC Radiation Exposure Statement:

This appliance and its antenna must not be co-located or operation in conjunction with any other antenna or transmitter. A minimum separation distance of 20 cm must be maintained between the antenna and the person for this appliance to satisfy the RF exposure requirements.

USER MANUAL OF THE END PRODUCT:

In the user's manual of the end product, the end user has to be informed to keep at least 20cm separation with the antenna while this end product is installed and operated.

IC Statement

This Class B digital apparatus complies with Canadian ICES-003.

Operation is subject to the following two conditions:

1. This device may not cause harmful interference and
2. This device must accept any interference received, including interference that may cause undesired operation.

Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.

This device and its antenna(s) must not be co-located or operation in conjunction with any other antenna or transmitter. The device could automatically discontinue transmission in case of absence of information to transmit, or operational failure. Note that this is not intended to prohibit transmission of control or signaling information or the use of repetitive codes where required by the technology.

IMPORTANT NOTE:

IC Radiation Exposure Statement:

This equipment complies with IC RSS-102 radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body.

IMPORTANT NOTE:

This module is intended for OEM integrator. The OEM integrator is still responsible for the IC compliance requirement of the end product, which integrates this module.

20cm minimum distance has to be able to be maintained between the antenna and the users for the host this module is integrated into. Under such configuration, the IC RSS-102 radiation exposure limits set forth for a population/uncontrolled environment can be satisfied.

Any changes or modifications not expressly approved by the manufacturer could void the user's authority to operate this equipment.

USERS MANUAL OF THE END PRODUCT:

In the user's manual of the end product, the end user has to be informed to keep at least 20cm separation with the antenna while this end product is installed and operated. The end user has to be informed that the IC radio-frequency exposure guidelines for an uncontrolled environment can be satisfied. The end user has to also be informed that any changes or modifications not expressly approved by the manufacturer could void the user's authority to operate this equipment. IC statement is required to be available in the user's manual: This Class B digital apparatus complies with Canadian ICES-003.

Operation is subject to the following two conditions: (1) this device may not cause harmful interference and (2) this device must accept any interference received, including interference that may cause undesired operation.

LABEL OF THE END PRODUCT:

The final end product must be labeled in a visible area with the following " Contains TX IC : 649E-WSM520V ".