2.4 ghz digital wireless dual microphones with usb … · 2.4 ghz digital wireless dual microphones...

LED

LED

LED

LEDCC2590CC8531

MSP430G2453 ADC3101

CC2590

USB AudioInput Device

SFlash CC8531

MSP430G2453

Dongle

SPII2S

I2C

SPI

I2C I2S

Buttons

Microphone

Speaker

PCM5102

TI Designs2.4 GHz Digital Wireless Dual Microphones with USBReceiver

TI Designs Design FeaturesTI Designs provide the foundation that you need • High-Performance 2.4-GHz Digital Wireless Stereoincluding methodology, testing, and design files to Microphonesquickly evaluate and customize the system. TI Designs • Automatic or Manual Pairing Between thehelp you accelerate your time to market. Microphone and the Dongle

• Automatic Volume Gain Control with the ADC ChipDesign Resources• The Dongle Works as an Analog Input to the Mixer

TIDM-WIRELESS- or as a USB Audio Input DeviceTool Folder Containing Design FilesMICROPHONE • Working Range Over 100 mMSP430G2453 Product Folder

• Include the Configuration Files for the CC8531 andCC8531 Product Folderthe MCU Source CodeCC2590 Product Folder

TLV320ADC3101 Product Folder Featured ApplicationsPCM5102 Product Folder

• Wireless Microphone• Wireless Speaker

ASK Our E2E Experts • Wireless HeadphoneWEBENCH® Calculator Tools

• Wireless Headset

An IMPORTANT NOTICE at the end of this TI reference design addresses authorized use, intellectual property matters and otherimportant disclaimers and information.

All trademarks are the property of their respective owners.

1TIDU545–October 2014 2.4 GHz Digital Wireless Dual Microphones with USB ReceiverSubmit Documentation Feedback

Copyright © 2014, Texas Instruments Incorporated

http://www.ti.com/tool/TIDM-WIRELESS-MICROPHONE


http://www.ti.com/product/MSP430G2453

http://www.ti.com/product/CC8531

http://www.ti.com/product/CC2590

http://www.ti.com/product/TLV320ADC3101

http://www.ti.com/product/PCM5102

http://e2e.ti.com/

http://e2e.ti.com/support/development_tools/webench_design_center/default.aspx

http://e2e.ti.com

http://www.go-dsp.com/forms/techdoc/doc_feedback.htm?litnum=TIDU545

Key System Specifications www.ti.com

1 Key System Specifications

Table 1. System Specification

PARAMETER SPECIFICATIONPower supply 2 AA batteries

RF output Max. 10 mW/+10 dBmDynamic range 110 dBaSampling rate 48 kHzAudio coding Slightly Lossy Compression Algorithm (SLAC)RF channel 18 Channels

Latency 14 msPower supply current (Microphone) 45 mA

Power supply current (Dongle) 55 mAWorking range 100 m (line of sight)

2 System DescriptionThis solution implements a set of 2.4-G wireless dual microphones with a USB receiver system. Thisdesign is built using one CC8531 RF master, two CC8531 RF slaves, and the MSP430G2453 controller.This solution could be used in a professional audio-amplifier system, a karaoke system, or other systems.With TI's ultra-low-power MCU controlling the power supply of the microphone, the battery life is longer.To ensure longer battery life, the wireless microphone will enter into standby mode when no wirelesssignal is detected for more than one minute. The wireless microphone could be paired to the receiverautomatically or manually. The volume can be manually changed with the key, and the power andconnection statuses are indicated with color LEDs.

2.1 CC8531The CC8531 is a 2.4-GHz RF SoC for wireless digital audio streaming. The CC8531 converts between theRF audio data and the I2S digital audio data. The CC8531 supports up to four audio channels as well as afull-speed USB audio device. However, only one kind of application can be chosen at a time. In thissolution, the master CC8531 will be configured as a USB audio device when it is plugged into a USB slotin the PC, and as an analog receiver when it is plugged in to a speaker.

2 2.4 GHz Digital Wireless Dual Microphones with USB Receiver TIDU545–October 2014Submit Documentation Feedback


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1

9

7

10

8

6

5

4

3

2

31

39

37

40

38

36

35

34

33

32

30

22

24

21

23

25

26

27

28

29

11

19

17

20

18

16

15

14

13

12

CC8521/31

USBN

DV

DD

DC

PL

xL

NA

EN

/GIO

15

IOV

DD

xP

AE

N/

GIO

14

GIO

I3

GIO

I2

SD

A/

GIO

11

SC

L/

GIO

10

AV

DD

USBP

CSN

SCLK

MOSI

MISO

GIO1

GIO2

GIO3

IOVDD

RS

TN

IOV

DD

MC

LK

/

GIO

4

BC

LK

/

GIO

5W

CL

K/

GIO

6

AD

0/

GIO

7

AD

1/

GIO

8

IOV

DD

GIO

9/

AD

2

AV

DD

RBIAS

VBAT

AVDD

AVDD

AVDD

RF_N

RF_P

AVDD

X0

X1

2.0V-3.6V

Power Supply

R1

01

Antenna

(50 Ohm)

C301

C302

L301

L302

L303

C303

C306

C305

Alternative:

CC2590 External LNA/PA

Antenna

(50 Ohm)CC2590 +

Matching/

Filtering

C4

02

XTA

L

C4

01

C391

L304

33 ohm

33 ohm

47 pF

47 pF

1.5

k o

hm

USB D-

USB D+

1

9

7

10

8

6

5

4

3

2

31

39

37

40

38

36

35

34

33

32

30

22

24

21

23

25

26

27

28

29

11

19

17

20

18

16

15

14

13

12

CC8520/30

xANTM

DV

DD

DC

PL

xL

NA

EN

/GIO

15

IOV

DD

xP

AE

N/

GIO

14

GIO

I3

GIO

I2

SD

A/

GIO

11

SC

L/

GIO

10

AV

DD

xANTP

CSN

SCLK

MOSI

MISO

GIO1

GIO2

GIO3

IOVDD

RS

TN

IOV

DD

MC

LK

/

GIO

4

BC

LK

/

GIO

5

WC

LK

/

GIO

6

AD

0/

GIO

7

AD

1/

GIO

8

IOV

DD

AD

2/

GIO

9

AV

DD

RBIAS

VBAT

AVDD

AVDD

AVDD

RF_N

RF_P

AVDD

X0

X1

Audio Device

2.0V-3.6V

Power Supply

R1

01

Antenna

(50 Ohm)

C301

C302

L301

L302

L303

C303

C306

C305

Alternative:

CC2590 External LNA/PA

Antenna

(50 Ohm)CC2590 +

Matching/

Filtering

C4

02

XTA

L

C4

01

C391

L304

www.ti.com System Description

Figure 1. Analog Application Circuit

Figure 2. USB Application Circuit

2.2 MSP430G2453The MSP430G2453 is an ultra-low-power mixed-signal microcontroller with built-in 16-bit timers, up to 24I/O capacitive-touch enabled pins, a versatile analog comparator, and a built-in communication capabilityusing the universal serial communication interface. In addition, the MSP430G2453 has a 10-bit analog-to-digital (A/D) converter with eight channels.



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MICBIAS1 AVDD

AVSS

DVDD

DVSS

IOVDD

RE

SE

T

D

IOVDD(1.1 V–3.3 V)

1.65 V–1.95 V

A

AVDD(2.6 V–3.6 V)

SD

A

SC

L

RP

RP

1 Fm

IOVDD

MC

LK

BC

LK

WLK

C

DU

TO

DBB

A

A

IN2R(P)

IN2L(P)

IN1L(P)

IN3R(M)

IN1R(M)

IN3L(M)

MICBIAS2

I2C_ADR0

I2C_ADR1

AdditionalStereoor Other

Analog Inputs

DigitalMicrophone(s)

DMDIN/GPIO1

DMCLK/GPIO2

D

VDD

GND

DATA

CLK

I2C

ADDRESS

0.1 Fm

1 Fm0.1 Fm

1 Fm0.1 Fm

1 Fm

1 Fm

1 Fm

1 Fm

1 Fm

2kW

1 Fm

1 Fm

2kW

1 Fm

Clock

System

Brownout

Protection

RST/NMI

DVCC DVSS

MCLK

Watchdog

WDT+

15-Bit

Timer0_A3

3 CC

Registers

16MHz

CPU

incl. 16

Registers

Emulation

2BP

JTAG

Interface

SMCLK

ACLK

MDB

MAB

Port P1

8 I/O

Interrupt

capability

pullup/down

resistors

P1.x

8

P2.x

Port P2

8 I/O

Interrupt

capability

pullup/down

resistors

Spy-Bi-

Wire

Comp_A+

8 Channels

Timer1_A3

3 CC

Registers

XIN XOUT

Port P3

8 I/O

pullup/

pulldown

resistors

P3.x

8 8

RAM

512B

256B

Flash

16KB

8KB

4KB

2KB

USCI A0

UART/

LIN, IrDA,

SPI

USCI B0

SPI, I2C

ADC

10-Bit

8 Ch.

Autoscan

1 ch DMA

System Description www.ti.com

Figure 3. MSP430G2453 Functional Block Diagram

2.3 TLV320ADC3101TLV320ADC3101 is a low-power stereo ADC with an embedded miniDSP for wireless handsets andportable audio. This ADC supports sampling rates from 8 kHz to 96 kHz with an integrated programmable-gain amplifier providing up to 40 dB analog gain or AGC. Front-end input coarse attenuation of 0 dB, –6dB, or off, is also provided. The inputs are programmable in a combination of single-ended or fullydifferential configurations. Extensive register-based power control is available via an inter-integrated circuit(I2C) interface, enabling mono or stereo recording. Low power consumption makes the TLV320ADC3101ideal for battery-powered portable equipment.

Figure 4. Typical Circuit Connections



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Decay Time AttackTime

TargetLevel

AGCGain

OutputSignal

InputSignal

www.ti.com System Description

The TLV320ADC3101 includes automatic gain control (AGC) for ADC recording. AGC can maintain anominally constant output level when recording speech. In AGC mode, the circuitry automatically adjuststhe PGA gain as the input signal becomes overly loud or very weak, such as when a person speaking intoa microphone moves closer to or farther from the microphone. The AGC algorithm has severalprogramable parameters, including target gain, attack and decay time constants, noise threshold, andmaximum PGA applicable, that allow the algorithm to be fine-tuned for any application. The algorithm usesthe absolute average of the signal (which is the average of the absolute value of the signal) as a measureof the nominal amplitude of the output signal. Because the gain can be changed at the sample intervaltime, the AGC algorithm operates at the ADC sample rate.

Figure 5. AGC Characteristics



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LDO

TI: TLV70033DDCRR

5 VIN3.3 V /200 mA:OUT

for CC8531,CC2590,PCM5102A,MCU

LED

LED

CC2590

USB AudioInput Device

SFlash CC8531

MSP430G2453

SPII2S

Speaker

PCM5102

Block Diagram www.ti.com

3 Block Diagram

3.1 The Block Diagram of the Dongle (Receiver)The block diagram of the dongle is shown in Figure 7, and the power supply diagram is shown in Figure 8.CC8531 is the RF audio transceiver center, and CC2590 is the RF range extender. The SFlash stores theconfiguration codes of different modes for CC8531, and the MSP430G2453 detects the connection targetand programs the CC8531 with the desired configuration code. The MSP430G2453 also controls thestatus of the LED display. PCM5102 is the DAC chip and is only useful when the dongle works in analogmode. When the dongle works in USB mode, the USB audio data transmits from the CC8531 to theplugged device (such as a PC).

Figure 6. Board Photo of the Dongle

Figure 7. System Diagram of the Dongle

The dongle is powered by the external 5-V power supply or the 5-V power USB. TLV70033DDCRconverts the 5-V input to a 3.3-V power supply for the devices on the board. The block diagram of thepower supply for the dongle is shown in Figure 8.

Figure 8. Power Supply for the Dongle

NOTE: Do not program the CC8531 too many times because its program life is 1000 cycles.



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LDO3 V

2 cells #5 dry Battery

TI: TPS78318DDCRIq=0.5 A

1.8V /150 mA:OUT

for TLV320ADC3101's core

LED

LEDCC2590CC8531

MSP430G2453 ADC3101

I2C

SPI

I2C I2S

Buttons

www.ti.com Block Diagram

3.2 The Block Diagram of the Microphone (Transmitter)The block diagram of the microphone is shown in Figure 10, and the power supply diagram is shown inFigure 11. CC8531 is the RF audio transceiver center, and CC2590 is the RF range extender. The MCUof MSP430G2453 detects the button status, controls the CC8531 for pairing, and controls the ADC3101 toadjust the volume.

Figure 9. The Board Photo of the Receiver

Figure 10. The System Diagram of the Microphone

The microphone is powered by two 5# dry batteries. The 3.3-V voltage input is converted to 1.8 V for low-power supply in ADC3101. The block diagram for the power supply of the microphone is shown inFigure 11.

Figure 11. Power Supply for the Microphone



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System Design Theory www.ti.com

4 System Design Theory

4.1 Input and Output InterfaceThe microphone has two buttons: a (DN) VOLUME button to mute or turn down the volume, and an (UP) VOLUME button to turn on, unmute, and turn up the volume. Each microphone has a power/statusLED that indicates the power and the link status. For the dongle, the power and the audio signal are allinput or output from the USB connector. The dongle has one wireless link-status LED and one work-modeLED.

4.2 Operation Manual

1. Press and hold the button to power on the wireless microphones.2. Connect the wireless receiver to the wireless-only USB connector on the wireless-enabled device or to

a USB port on a computer. Put the wireless microphones closely to the receiver; the microphones willautomatically sync to the receiver.

3. Use the and buttons on the wireless microphones to adjust the volume.4. Press and hold the button for 1.5 seconds to mute the microphone volume.5. Press the button to unmute the volume of the wireless microphones if the volume has been muted.6. If the wireless receiver is removed from the USB port, the wireless microphones will power off (the

MCU enters into standby mode) when no wireless signal is detected for more than one minute.7. Press and hold the and buttons simultaneously for 1.5 seconds on each wireless microphone to

pair the microphone with another receiver.

4.3 State MachineIn a wireless audio network, the CC8531 on the dongle board works as the master, and the CC8531 onthe microphone board works as the slave. The slave must be paired with the master before connectingwith the master.



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NOT PAIRED PAIRED

STANDBY

NO LINK

WORK

MUTE

POWERED

Close to powered Dongle

Longer than 1 minute

Longer than 1 minute

Hold UP button & paired

Hold UP button &

not paired

Hold DN buttonDongle =

POWER ON

Dongle =POWER OFF

Press UP button

Close to powered Dongle

No active Dongle

www.ti.com System Design Theory

4.3.1 State Machine of the MicrophoneThe microphone has the following states in its life cycle:• Powered: The microphone is powered on with two 5# batteries.• Paired: The CC8531 on the microphone is paired with the master and can connect with the master.• Not Paired: The microphone is not paired with the master and cannot connect with the master. If the

microphone is powered on from this state, its status will be No Link, and the status LED will blink.• Standby: The MCU is in low-power mode and the CC8531 is inactive. The status LED is off.• Work: The slave CC8531 can connect with the master CC8531, and the microphones work normally.

In this state, the status LED is on.• No Link: The MCU is in normal mode and the slave CC8531 cannot connect with the master CC8531.

In this state, the status LED will blink at 0.3 Hz.• Mute: The MCU is in normal mode and the CC8531 connection is good, but the volume is mute. In this

state, the status LED will blink at 1 Hz.

Figure 12. State Machine of the Microphone



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NOT PAIRED

PAIREDNO LINK

WORK

FIRST TIME

POWER ON

Mic = WORK

Mic = STANDBY

Mic = WORK

Mic closer / paired by user

Not paired by user

System Design Theory www.ti.com

4.3.2 State Machine of the DongleThe dongle has following states in its life cycle:

• Paired: The CC8531 on the dongle is paired with the slave and can connect with the slave. The pairedstatus is memorized even when the dongle is not powered on.

• Not Paired: No microphone is paired with the dongle.• Work: The slave CC8531 can connect with the master CC8531, and the microphones work normally.

In this state, the status LED is on.• No Link: The MCU is in normal mode and the slave CC8531 cannot connect with the master CC8531.

In this state, the status LED will blink at 0.3 Hz.

Figure 13. State Machine of the Dongle



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www.ti.com Getting Started Hardware

5 Getting Started HardwareTo debug the system, the necessary test points are designed on the bottom side of the board as shown inFigure 14 and Figure 15. The testing wire should be welded to these points to connect with the debuggingtools.

Figure 14. Bottom Side of the Receiver Board Figure 15. Bottom Side of the Slave Board

5.1 MSP430 USB Debugging InterfaceThe MSP430-FET430UIF, which is shown in Figure 16, debugs the firmware on the MCU.

Figure 16. MSP430-FET430UIF



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1 2

3 4

5 6

7 8

9 10

GND

DC (Debug Clock)

Csn (SPI Chip Select)

RESETn

3.3V (from debugger) MISO (SPI Data In)

MOSI (SPI Data Out)

SCLK (SPI Clock)

DD (Debug Data)

Target Voltage Sense

1

3

5

7

9

11

13

2

4

6

8

10

12

14

TEST/SBWTCK

MSP430Fxxx

RST/NMI/SBWTDIOTDO/TDI

TCK

GND

TEST/VPP

JTAG

VCC TOOL

VCC TARGET

330Ω

R2

J1 (see Note A)

J2 (see Note A)

Important to connect

V /AV /DVCCCC CC

V /AV /DVSS SS SS

R147 kΩ

C12.2 nF

VCC

C210 µF

C30.1 µF

A If a local target power supply is used, make connection J1. If power from the debug or programming adapter is used,

make connection J2.

Getting Started Hardware www.ti.com

To debug the MCU software, connect the following four points on the board to the debugger: VCC, GND,RST, and TEST. The connection should follow the illustration in Figure 17.

Figure 17. Spy-Bi-Wire Connection

5.2 CC DebuggerThe CC Debugger (Figure 18) programs Flash on the software running on CC8531. The manual of the CCDebugger can be downloaded here: http://www.ti.com/lit/ug/swru197h/swru197h.pdf. To flash the firmwareto the CC8531, connect the GND, Target Voltage Sense, Csn, SCLK, RESETn, MOSI, and MISO pins tothe corresponding test points as shown in Figure 19.

Figure 18. CC Debugger Figure 19. Target Connector Pin-Out



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http://www.ti.com/lit/ug/swru197h/swru197h.pdf


www.ti.com Getting Started Firmware

6 Getting Started FirmwareTo develop the firmware for the MCU, download and install Code Composer Studio 5.5.0. To flash theconfiguration firmware to the CC8531, download and install PurePath Wireless Configurator.

6.1 Necessary Tool softwareThe site to download the Code Composer Studio 5.5.0:http://processors.wiki.ti.com/index.php/Download_CCS#Code_Composer_Studio_Version_5_Downloads

The site to download the PurePath Wireless Configurator 1.4.2: http://www.ti.com/tool/purepath-wlcfg?keyMatch=purepath%20wireless%20configurator&tisearch=Search-EN

The design software is in the package WP_SoftwarePackage.zip.

6.2 The firmware for the CC8531After the WP_SoftwarePackage.zip is extracted, two folders will appear as shown in Figure 20. Thedirectory WP_CC8531_ppwCfg_V1_0 contains the firmware for CC8531.

Figure 20. Folders in the WP_SoftwarePackage.zip Figure 21. Directory Including Configuration Files forCC8531

The UI of the PurePath Wireless Configurator is shown in Figure 22.

Figure 22. PurePath Wireless Configurator



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http://processors.wiki.ti.com/index.php/Download_CCS#Code_Composer_Studio_Version_5_Downloads

http://www.ti.com/tool/purepath-wlcfg?keyMatch=purepath%20wireless%20configurator&tisearch=Search-EN

http://www.ti.com/tool/purepath-wlcfg?keyMatch=purepath%20wireless%20configurator&tisearch=Search-EN


Getting Started Firmware www.ti.com

To open the project file, click the "open" icon, find the configuration directory in the opened dialog, anddouble-click the desired project file name (as shown in Figure 21). The files in the directoryHost_Master_Customer are for the analog master mode. The files in the directory USB_Master_Customerare for the USB-audio-device master mode. The configuration for the slave is the same in both analogmode and USB-audio-device mode.

Figure 23. Open PPW Project Dialog

After the ppwprj file is opened, the configuration items will be displayed. To switch the display betweenitems for the master, items for the slave, and flash programming, click the caption in the left window asshown in Figure 24, Figure 25, and Figure 26.

Figure 24. UI for the Master Configuration



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Figure 25. UI for the Slave Configuration

Figure 26. UI for the Flash Programming (Including Master and Slave)



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To program the flash for CC8531, use the CC Debugger to connect the PC and the target board. After theestablishing the connection, press the reset button on the CC Debugger. The device name will be listed inthe “Connected devices” field of the PPW configurator as shown in Figure 26. Select the project file to beflashed in the “Current project” field, then click the bottom “Program CC85xx device” button to finish theprogramming.

For more details about how to use the configurator, please access the configurator's integrated helpsystem and refer to the CC85xx Family User’s Guide.

6.3 The CCS projects and source code for the MCUAfter the WP_SoftwarePackage.zip is extracted, folder WP_MCU_SW_V1_0 will be available. Thisdirectory contains the source code and the CCS project for the master and the slave.

Figure 27. WP_MCU_SW_V1_0 Directory



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The "proj" directory contains five projects: CC85xx_EHIF_lib, WP_master, WP_slave,WP_master_FCCTest and WP_slave_FCCTest. To open these projects, open the Code Composer StudioV5.5.0, then from the menu click “project → import the CCS Eclipse projects” to import the projects fromthe directory “WP_MCU_SW_V1_0\MSP430G2453\proj”. Figure 28 shows this data.

Figure 28. Import the CCS Projects Figure 29. Active Debug

For each project, set debug as active as shown in Figure 29, and build the project. The corresponding .outfile will be generated in the "Debug" and "Binaries" folders if no compiling errors occur. The .out file is theexecutable file that should be downloaded to the MCU. Connect the target board and the PC with theMSP430-FET430UIF to download the .out file to the flash of the MCU.



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6.4 Work as the USB Recording DeviceIf the dongle is plugged into the USB port of the PC, the dongle will be identified as a USB recordingdevice as shown in Figure 30. The device name can be found by clicking “Device identification → Productname”, which is set in the PPW configurator as shown in Figure 31.

Figure 30. Device Name Listed in the Recording Devices

Figure 31. Device Name Setting in the PPW Configurator



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www.ti.com Test Setup

7 Test SetupFor FCC RF certification testing, all of the devices should pass the eight RF testing items. A spectrumanalyzer is required for the testing. The antenna on the board should be broken down and replaced with acable to the instrument.

Figure 32. FCC Test Setup

Setup Procedure:1. Connect the instrument and test board as shown in Figure 32.2. For the dongle board, press the power-on button to change the testing content to the next testing

content as shown in Table 2. For the microphone board, press the UP button to change the testingcontent to the next one.

3. Measure the RF signal on the spectrum analyzer to confirm the RF signal programmed on the testboard.

8 Test DataFor FCC RF certification testing, all of the devices should pass the eight RF testing items. With the testingfirmware, the eight items have been tested and the result is in Table 2:

Table 2. FCC Test Result

NO. TESTING CONTENT RESULT1 Outputs a continuous-wave RF signal at 2406 MHz. PASS2 Outputs a continuous-wave RF signal at 2438 MHz. PASS3 Outputs a continuous-wave RF signal at 2474 MHz. PASS4 Outputs a pseudo-random modulated RF signal at 2406 MHz. PASS5 Outputs a pseudo-random modulated RF signal at 2438 MHz. PASS6 Outputs a pseudo-random modulated RF signal at 2474 MHz. PASS7 Receiver only mode. PASS8 Transmitter only mode with the packet error rate test. PASS

9 Design Files

9.1 SchematicsTo download the schematics, see the design files at TIDM-WIRELESS-MICROPHONE.



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Design Files www.ti.com

Figure 33. Schematics Page 1

Figure 34. Schematics Page 2



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www.ti.com Design Files

9.2 Bill of MaterialsTo download the bill of materials (BOM), see the design files at TIDM-WIRELESS-MICROPHONE.

Table 3. BOM

ITEM QTY REFERENCE VALUE PART MANUFACT MANUFACTU PCBDESCRIPTION URER RER PART FOOTPRINT

NUMBER1 1 C1 47pF; 50V CAP CER; SMT402

C0G; 5%;2 1 D1 TRANSPARENT LED HIB SMD603

AMBER3 1 R1 274 ohm RESISTOR; SMD402

METAL;0W0625; 1 %;100 PPM

4 1 X1 CONNECTOR X- SMDCF20101D0R0-FFC/FPC-SMD

5 6 C2, C14, C25, C33, 1 nF; 50 V CAP CER; SMD402C54, C55 C0G

6 11 C24, C32, C36-C41, 100 nF; 16 V CAP CER; SMD402C45-C47 X7R

7 11 C1, C3-C7, C16, C19- 2.2 uF; 6.3 V CAP CER; SMD402C21, C48 X5R; 20 %

8 4 C8, C9, C13, C17 2.2 uF; 6.3 V CAP CER; SMT402X5R; 20 %

9 1 C50 1pF2; 50 V CAP CER; SMT402C0G; ±0pF1

10 1 C52 1pF8; 50 V CAP CER; SMT402C0G; ±0pF1

11 1 C51 6pF8; 50 V CAP CER SMT40212 1 C53 18pF; 50 V CAP CER SMT40213 1 C49 27pF; 50 V CAP CER SMT40214 2 C43, C44 33pF; 50 V CAP CER SMT40215 1 C42 220pF; 50 V CAP CER SMT40216 5 C10-C12, C22, C23 220 uF; 6.3 V CAP TANTAL SMD120617 1 L7 1.6 nH COIL SMD40218 5 L2-L6 330 ohm COIL SMD60319 1 L10 3.9 nH COIL SMD40220 1 L9 2.2 nH COIL SMD40221 1 L11 1.5 nH COIL SMD40222 1 X1 CONNECTOR X- SMD

CF20101D0R0-FFC/FPC-SMD

23 1 IC1 ADC3101 IC; AD/DA Texas TLV320ADC31 SMD; QFN24Instruments 01

24 1 IC3 TPS78318 IC; Texas TPS78318DD SMD; SOT23VOLT.REGUL Instruments CATOR

25 1 IC4 CC8531 IC; DSP; Texas CC8531 SMD; VQFN40Instruments

26 1 C28 10 uF; 10 V; CAP TANTAL SMD080527 1 IC5 CC2590 IC; DIGITAL Texas CC2590 SMD; VQFN16

AUDIO Instruments28 1 D2 GREEN LED HIB SMD603



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Design Files www.ti.com

Table 3. BOM (continued)ITEM QTY REFERENCE VALUE PART MANUFACT MANUFACTU PCB

DESCRIPTION URER RER PART FOOTPRINTNUMBER

29 1 Q2 48 MHz QUARZ; SMD3225OSCILLATOR

30 1 R22 4.32 kohm RESISTOR; SMD402METAL

31 1 R17 56.2 kohm RESISTOR; SMD402METAL

32 2 R1,R2 1 kohm RESISTOR; SMD402CARBON

33 4 R3-R6 2 kohm RESISTOR; SMD402METAL

34 1 R20 100 ohm RESISTOR; SMD402METAL

35 1 IC2 MSP430G2453 MICROCONT Texas MSP430G2453 SMD; TSSOP:ROLLER Instruments IPW20 20

36 1 R12 47 kohm RESISTOR; SMD402METAL

37 1 R7 0 ohm RESISTOR; SMD603CARBON

38 4 C2, C7, C14, C33 1 nF; 50 V CAP CER SMD40239 17 C3, C4, C6, C12, 100 nF; 16 V CAP CER SMD402

C15,C18, C22, C25,C26, C32, C34, C38,C40, C41, C48, C51,C53

40 10 C5, C23, C27, C35, 2.2 uF; 6.3 V CAP CER SMD402C37, C39, C42, C45,C49, C52

41 2 C16, C19 2nF2; 50 V CAP CER SMT60342 1 C10 1pF2; 50 V CAP CER SMT40243 1 C20 1pF8; 50 V CAP CER SMT40244 1 C17 6pF8; 50 V CAP CER SMT40245 1 C1 18 pF; 50 V CAP CER SMT40246 1 C11 27 pF; 50 V CAP CER SMT40247 2 C21, C24 33 pF; 50 V CAP CER SMT40248 2 C29, C30 47 pF; 50 V CAP CER SMT40249 1 C13 220 pF; 50 V CAP CER SMT40250 1 C28 10 uF; 10 V CAP TANTAL SMD080551 1 C36 47 uF; 10 V CAP TANTAL SMD080552 5 C43, C44, C46, C47, 220 uF; 6.3 V CAP TANTAL SMD1206

C5053 1 L1 1.6 nH COIL SMD40254 6 L6-L11 330 ohm COIL SMD60355 1 L4 3.9 nH COIL SMD40256 1 L3 2.2 nH COIL SMD40257 1 L5 1.5 nH COIL SMD40258 1 IC5 PCM5102A IC; AD/DA Texas PCM5102A SMD; TSSOP;

Instruments 2059 1 IC6 TLV70033DDCR IC; Texas TLV70033DDC SOT23

VOLT.REGUL Instruments RATOR

60 1 IC4 CC8531 Wireless RF Texas SMD; VQFN40transceiver Instruments



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www.ti.com Design Files

Table 3. BOM (continued)ITEM QTY REFERENCE VALUE PART MANUFACT MANUFACTU PCB

DESCRIPTION URER RER PART FOOTPRINTNUMBER

61 1 IC2 W25X10CLSNIG FLASH AT25FS010N- SMD; SOIC8SH27-B

62 1 IC1 MSP430G2453 MICROCONT Texas MSP430G2453 SMD; TSSOP;ROLLER Instruments IPW20 PINS: 20

63 1 IC3 CC2590 IC; DIGITAL Texas CC2590 SMD; VQFN16AUDIO Instruments

64 1 D3 TRANSPARENT LED HIB SMD603AMBER;

65 1 D1 GREEN LED HIB SMD60366 1 Q1 48 MHz QUARTZ; SMD3225

OSCILLATOR67 2 R9, R10 470 ohm RESISTOR; SMD402

METAL68 2 R12, R15 47 kohm RESISTOR; SMD402

METAL69 1 R14 274 ohm RESISTOR; SMD402

METAL70 1 R6 1.5 kohm RESISTOR; SMD402

CARBON71 1 R3 4.32 kohm RESISTOR; SMD402

METAL72 1 R7 56.2 kohm RESISTOR; SMD402

METAL73 1 R4 0 ohm RESISTOR; SMD603

CARBON74 2 R1, R2 33 ohm RESISTOR; SMD402

THICK FILM75 1 R11 100 ohm RESISTOR; SMD402

METAL;PPM100

76 3 R5, R13, R16 100 kohm RESISTOR; SMD402THICK FILM

77 1 X1 CONNECTOR- USB3.0-AM-9- 160-EPUSB/1MM/ANGLED 1

9.3 Software FilesTo download the software files, see the design files at TIDM-WIRELESS-MICROPHONE.

10 References

1. CC85xx External Host Interface: Examples and Library, SWRA369A2. CC85xx Family User’s Guide, SLOA082 Design files, SWRU250L, November 20123. MSP430 Hardware Tools User's Guide, SLAU278R, May 2009 – Revised May 20144. CC Debugger User's Guide, SWRU197H, September 2010 – Revised April 2014



http://www.ti.com


http://www.ti.com/lit/ug/swru250l/swru250l.pdf


About the Author www.ti.com

11 About the AuthorJEANNE YI is a Systems Application Engineer at Texas Instruments, where she is responsible fordeveloping system design solutions for the industrial segment. Jeanne brings to this role her extensiveexperience in high-speed digital, low-noise analog, and RF system-level design expertise. Jeanne earnedher Bachelor of Engineering in Automation from Shanghai Tiedao University in Shanghai, China.



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