Wistron NeWeb SWA13 Wireless Audio Module User Manual

Wistron NeWeb Corporation Wireless Audio Module

User Manual

CONFIDENTIAL | PROVIDED UNDER NDA
General Description
The SWA13-TX module is part of a family of
products that represents a new level of system
integration offering customers fast time to market
with a point-to-point or point-to-multi-point,
mono, or stereo, wireless connections. These
modules are optimized for low-cost, high-quality
and ease-of-use.
The SWA13-TX module serves as the sender in
point-to-multipoint wireless audio networks.
The module incorporates Avnera’s proprietary
wireless audio protocol, designed from the ground
up specifically for audio. It features low fixed
latency, uncompressed CD quality mono or stereo
audio, superior interference immunity and
industry leading coexistence with WiFi – even at
close proximity to a WiFi device.
The SWA13-TX module integrates all features
necessary to complete a wireless stereo or mono
link, including AV6301 Wireless Audio Sender Chip,
printed diversity antenna, flash memory, interface
connector and all passive components. Just supply
5 Volts and an I2S interface and you are ready to
create a wireless audio link.
The module measures just 26 x 60 x 3.5 mm and is
provided with a 24 pin FPC connector or pin
header for connection to the system board.
The module is certified to FCC and CE standards.
Applications
Wireless Subwoofers
Stereo Wireless Rear Speakers
Soundbar / Audio Video Receiver / BluRay
Mono/Stereo Audio Channel Transmission
Features
Audio Interfaces
I2S Digital Input interface with >94dB end-
to-end digital audio path
> 15m range
Frequency range: 2.4 GHz ISM band, continuous
dynamic frequency selection
Forward error correction coding, error detection,
and audio-specific error concealment
Dual printed PCB diversity antennas for
multipath and fading mitigation
Auto-search/synch and dynamic channel
selection
Low and fixed latency <17 ms
24 pin FPC or pin header connector
Sample rate converter:
Over-the-air firmware update capability
Customizable firmware for simple,
General purpose over-the-air (OTA) serial
interface:
> 2 kbps, bi-directional, full duplex
Support for amplifier control data, meta-
data, and remote control commands
SWA13-TX
Module Datasheet
SWA13-TX Module Datasheet Rev 0.1
CONTENTS SUBJECT TO CHANGE WITHOUT NOTICE 2
1. SWA13-TX Functional
The SWA13-TX module is available in a single incarnation; digital input transmitter module. There are two I2S ports, a
separate I2S port for digital audio input and an I2S out port is available for future applications. I2S may be configured to
be a master or a slave. In addition, MCLK can be generated from the module, or input to the module as required by the
system application.
錯誤! 找不到參照來源。 shows the block diagram of the SWA13-TX module.
The highly integrated nature of the AV6301 transceiver IC results in few external components being required for the
SWA13 module design. 2 PCB antennas are used to achieve increased range through antenna diversity. The simple RF
path consists only of the antennas, associated tuning components, an RF switch and a balun connected to the AV6301
IC. A 16MHz crystal generates the AV6301 system clock signal used as the basis for all RF and digital audio signals.
A 2Mb flash memory stores the factory based firmware, as well as firmware upgrade images and configuration
parameters. The module firmware enables upgrades to be performed by the I2C slave interface or over-the-air. The
module can be controlled from an external host device via the I2C interface. The I2C master port allows the module to
control other system devices such without having to add another MCU to the product design. Up to a maximum of 17
GPIOs are supported with the SWA13 module including I2C and I2S signals. This large number of GPIOs can be
leveraged to implement low cost sub-woofer designs as outlined below.
The SWA13-TX module offers both standard latency and low-latency firmware with different over the air sample rate.
While the standard 22.2KSps over the air sample rate optimizes audio quality and WiFi co-existence performance;
Lower audio latency can be achieved by using the low-latency 44.4KSps over the air sample rate.
SWA13-TX Module Datasheet Rev 0.1
CONTENTS SUBJECT TO CHANGE WITHOUT NOTICE 3
Multi-Client Implementation:
1.1. SWA13-TX Module Connections
Signal Type
Description
+5V Supply
Single +5V +/10% supply rail to the module
Reset
Active low reset input. This pin is driven from an open collector/drain device such that it can pull
to ground for the active reset state but, when released, must go to a high impedance state. If this
input is driven high the internal reset circuit on the module will not operate correctly.
I2S In Port
The I2S input port can be configured as a master or slave. Consequently BCLK and WCLK can be
either inputs or outputs. In addition, MCLK can be generated by the module on pin 16, or used as
an input. Typically, as the AV6301 IC contains a sample rate converter, MCLK is not required to be
supplied to the module when it is an I2S slave. CMOS 3.3 logic levels are used for all I2S signals.
I2C Slave Port
The I2C slave port is used for external host communication and during module test. It is assumed
that external pull up resistors are connected at the I2C master communicating with the module.
I2C Master Port
The I2C master port is used to communicate with external audio devices such as a sub-woofer
amplifier. The SDA and SCL signal lines have pull ups internal to the module.
GPIOs
3.3V CMOS logic level GPIOs available to connect to other devices, or to use as UI supporting
GPIOs for LED and button support. All supported GPIOs can be configured as inputs or outputs.
SWA13-TX Module Datasheet Rev 0.1
CONTENTS SUBJECT TO CHANGE WITHOUT NOTICE 4
2. SWA13-TX Connector Information
Table 1-1 SWA13-TX Connector Information
No
Pin Name
I/O
Pin
Pin Description
1
VDD
-
+5V +/- 10%
2
VDD
-
+5V +/- 10%
3
I2S_STEREO_OUT
I/O
28
I2S stereo out or GPIO
4
I2S_MONO_OUT
I/O
26
I2S mono out or GPIO
5
GPIO / PWM
I/O
25
Function defined by firmware application.
6
Reset
I
24
Driven from open drain external source. Can
be left open.
7
I2C_SCL_S / S_MISO
I/O
44
I2C slave or SPI slave port
8
I2C_SDA_S / S_MOSI
I/O
45
I2C slave or SPI slave port
9
I2C_SCL_M
O
37
I2C master port or GPIO
10
I2C_SDA_M
I/O
43
I2C master port or GPIO
11
S_SCLK
I
46
SPI slave port or GPIO
12
GND
-
Ground
13
BCLK
I/O
30
Function defined by firmware application.
14
WCLK
I/O
29
Function defined by firmware application.
15
S_SSB
I
47
SPI slave port or GPIO
16
MCLK
O
31
I2S port or GPIO
17
I2S_STEREO_IN
I
27
I2S port or GPIO
18
M_SSB/GPIO6
O
36
Function defined by firmware application.
19
M_SCLK/GPIO1
O
35
Function defined by firmware application.
20
M_MOSI/GPIO8
O
34
Function defined by firmware application.
21
M_MISO/GPIO9
I
33
Function defined by firmware application.
22
DP
I/O
41
USB 2.0 positive transceiver I/O
23
DM
I/O
42
USB 2.0 negative transceiver I/O
24
GND
-
Ground
SWA13-TX Module Datasheet Rev 0.1
CONTENTS SUBJECT TO CHANGE WITHOUT NOTICE 5
3. Electrical Specifications
3.1. Absolute Maximum Ratings
Absolute Maximum Ratings (AMR) are stress ratings only. AMR corresponds to the maximum value that can be applied
without leading to instantaneous or very short-term unrecoverable hard failure (destructive breakdown). Stresses
beyond those listed under AMR may cause permanent damage to the device.
Functional operation of the device at these or any other conditions beyond those indicated under “Recommended
Operating Range” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may adversely
affect device reliability.
Device functional operating limits and guaranteed performance specifications are given under Electrical Characteristics
at the test conditions specified.
Table 1-2 Absolute Maximum Ratings
CONDITION
MIN
MAX
+5V Supply Voltage Input
-0.3V
6.0V
Input Voltage Range – Digital Inputs
-0.3V
3.6V
Operating Temperature
-10ºC
+70ºC
Storage Temperature
-20ºC
+80ºC
Static Discharge Voltage1
-6kV
+6kV
Note 1: ±6kV @ bottom test pads, 150pF/330ohms discharge per IEC/EN61000-4-2
3.2. Recommended Operating Range
Table 1-3 Recommended Operating Ranges
PARAMETER
MIN
TYP
MAX
UNIT
+5V Supply pin voltage
4.5
5.0
5.5
V
Ambient Temperature (TA)
0
60
ºC
SWA13-TX Module Datasheet Rev 0.1
CONTENTS SUBJECT TO CHANGE WITHOUT NOTICE 6
3.3. Electrical Characteristics
Test Conditions: TA=+25ºC, Vsupply=+5.0V
Table 1-4; SWA13-TX RF Transceiver Characteristics
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
RF Frequency Range
2405
2477
MHz
Tx Output Power1
1.5
dBm
Rx Sensitivity2
-88
dBm
Range (LOS)
15
m
Note 1: Measured with the SWA13 PCB antenna disabled and test RF connector added.
Note 2: Measured with the SWA13 PCB antenna disabled and test RF connector added. Sensitivity is defined as the onset of 0.2% BLER
Clock Error Rate.
Table 1-5; SWA13-TX Audio Characteristics
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
Frequency Response1
20
20K
Hz
Gain Flatness2
0dB Input/Output Gain
±0.2
dB
SNR
I2S Input/Output
94
dB
THD+N
94
dB
Note 1: 16 bit audio, 44.4KSps over-the-air sample rate firmware build
Note 2: 16 bit audio, 44.4KSps over-the-air sample rate firmware build – 20 kHz frequency response
Table 1-6; SWA13-TX Audio Latency Characteristics
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
22.2KSps OTA Sample Latency
Standard Firmware
17
ms
44.4KSps OTA Sample Latency
Standard Firmware
14
ms
22.2KSps OTA Sample Latency
Low Latency Firmware
13.5
ms
44.4KSps OTA Sample Latency
Low Latency Firmware
8.5
ms
Table 1-7; SWA13-TX Current Characteristics
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
Tx Module Configuration
Linked1
35
mA
Tx Module Configuration
Searching2
22
mA
Tx Module Configuration
FCC Tx3
63
mA
Note 1: Specification represents an average current with the I2S clocks running. Peak current is ~ 2x the average.
Note 2: Searching is the average current where the TX module is not linked but is attempting to find a Rx module to link with. Peak
current is ~70mA.
SWA13-TX Module Datasheet Rev 0.1
CONTENTS SUBJECT TO CHANGE WITHOUT NOTICE 7
Ordering Information
Table 1-8: SWA13-TX Module Ordering Information
Module Part
Number
Option
Code
Description
SWA13
-TX
Digital Input , FPC Connector, integrated printed PCB antennas
SWA13-TX Module Datasheet Rev 0.1
CONTENTS SUBJECT TO CHANGE WITHOUT NOTICE 8
FCC Statement:
Federal Communication Commission Interference Statement
This equipment has been tested and found to comply with 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 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 circuit different from that to which the receiver
is connected.
● Consult the dealer or an experienced radio/TV technician for help.
FCC Caution: Any changes or modifications not expressly approved by the party
responsible for compliance could void the user’s authority to operate this equipment.
This device complies with Part 15 of the 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 may cause undesired operation.
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 equipment complies with FCC 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.
SWA13-TX Module Datasheet Rev 0.1
CONTENTS SUBJECT TO CHANGE WITHOUT NOTICE 9
IMPORTANT NOTE:
This module is intended for OEM integrator. The OEM integrator is still responsible for the
FCC 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 FCC
radiation exposure limits set forth for an 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 users 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 FCC 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. If the size of the end product is smaller than 8x10cm,
then additional FCC part 15.19 statement is required to be available in the users manual:
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 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
FCC ID: NKR-SWA13 ". If the size of the end product is larger than 8x10cm, then the
following FCC part 15.19 statement has to also be available on the label: 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 may cause undesired operation.
SWA13-TX Module Datasheet Rev 0.1
CONTENTS SUBJECT TO CHANGE WITHOUT NOTICE 10
IC Statement:
This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B conforme á la norme NMB-003 du Canada.
This device complies with Industry Canada license-exempt RSS standard(s). Operation is
subject to the following two conditions: (1) this device may not cause interference, and (2)
this device must accept any interference, including interference that may cause undesired
operation of the device.
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de
licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de
brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le
brouillage est susceptible d'en compromettre le fonctionnement.
This device and its antenna(s) must not be co-located or operation in conjunction with any
other antenna or transmitter.
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.
SWA13-TX Module Datasheet Rev 0.1
CONTENTS SUBJECT TO CHANGE WITHOUT NOTICE 11
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 an 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 users 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 users 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 :
4441A-SWA13 ".

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