CTE TECH CTE-BT2 Bluetooth Module Instruction Manual

CTE-BT2 Bluetooth Module

1. Specifications

1.1. General Specifications

• Model Name: CTE_BT2 Bluetooth Module
• Bluetooth Standard: Bluetooth 5.4
• Chipset: QCC5181 WLCSP
• Dimensions: 17mm x 19mm x 1.7mm
• Operating Voltage: 3.0V ~ 4.6V
• Operating Temperature: -40°C ~ +85°C
• Storage Temperature: -40°C ~ +85°C

1.2. Electrical Specifications

• Frequency Range: 2402-2480MHz
• Maximum RF Transmit Power: 13.5dBm
• π/4 DQPSK Receive Sensitivity: -94.5dBm
• 8DPSK Receive Sensitivity: -88dBm

1.3. Key Features

• Earbud and Headset Applications
• Supports aptX Adaptive Lossless (R2.2) and Snapdragon Sound Gaming Codec
• cVc (Clear Voice Capture) Noise Suppression (3-Mic for Earbud Application only)
• 3-Mic cVc with Machine Learning-based noise suppression
• Adaptive Transparency Wind Noise Reduction
• Machine Learning Framework
• Bluetooth Low Energy Audio Broadcast Receiver (BMR)
• Low Latency Gaming Mode for A2DP
• LE Audio Unicast Music Receiver with Gaming mode, Call Terminal, and Stereo Recording
• Wireless device test service for manufacturing
• Over the air update for ST Micro-based Earbud RDP case
• In charger case pairing
• Charging Case Power Line Communications using the fast comms scheme

1.4. Audio Subsystem

• Dual 32-bit Kalimba audio digital signal processor (DSP) cores with flexible clocking from 2 MHz to 240 MHz
• DSPs execute code from ROM and from program RAM
• 384 KB program RAM
• 1408 KB data RAM

1.5. Application Subsystem

• Dual-core application subsystem 32/80 MHz operation
• 32-bit Firmware Processor (reserved for system use) executes Bluetooth upper stack, profiles, house-keeping code
• 32-bit Developer Processor executes developer applications
• Both cores execute code from external flash memory using QSPI clocked at 32 MHz or 80 MHz
• On-chip caches per core enable optimized performance and power consumption

1.6. Bluetooth Subsystem

• Qualified to Bluetooth v5.4 specification including 2 Mbps Bluetooth Low Energy and Bluetooth Low Energy Isochronous Channels supported
• Class 1 support

1.7. Module Package Information

• Dimension: Postage stamp hole
• Module Pin descriptions (Refer to section 5.2 in the original manual)
• Device Terminal Functions (Refer to section 5.3 in the original manual)

2. Usage Instructions

2.1. Applications

The CTE_BT2 Bluetooth Module is designed for integration into:

• Wired/wireless stereo headsets/headphones/Dongle
• Qualcomm True Wireless™ stereo earbuds

2.2. Integration Guidelines for OEMs and Host Integrators

The OEM or integrator is obligated to adhere to the following requirements and restrictions as a condition for using the module’s certification:

• The OEM or integrator is responsible for performing the required additional host regulatory testing and/or obtaining the required host approvals for compliance.
• This module has been tested for compliance to FCC Part 15 Subpart C (15.247).

2.3. Electrical Characteristics

2.3.1. Absolute Maximum Ratings

Rating	Minimum	Maximum
Storage temperature	-40°C	+85°C

2.3.2. Recommended Operating Conditions

Operating Condition	Minimum	Maximum
Operating temperature range	-40°C	+85°C
Supply voltage: VBAT	+3.0V	+4.6V

2.4. Labeling

The module features a laser engraving printing label.

3. Troubleshooting

Specific troubleshooting steps are not detailed in the provided manual. However, general troubleshooting for Bluetooth modules often involves:

• Power Supply: Ensure the module is receiving the recommended operating voltage (3.0V ~ 4.6V). Incorrect voltage can lead to unstable operation or no functionality.
• Environmental Conditions: Verify that the module is operating within the specified temperature range (-40°C ~ +85°C). Extreme temperatures can affect performance.
• Antenna Connection: Ensure the antenna is properly connected and not obstructed, as this can impact signal strength and range.
• Software/Firmware: Check for the latest firmware updates for the module and ensure the host application software is correctly configured to communicate with the module.
• Interference: Identify potential sources of 2.4GHz interference that might be affecting Bluetooth communication.
• Host Integration: For integrators, review the host device’s design for proper power delivery, signal integrity, and adherence to layout guidelines for RF components.

4. FAQ

Q: What Bluetooth version does the CTE_BT2 module support?
A: The CTE_BT2 module supports Bluetooth 5.4.
Q: What are the primary applications for this module?
A: It is primarily designed for wired/wireless stereo headsets/headphones/dongles and Qualcomm True Wireless™ stereo earbuds.
Q: What is the operating voltage range for the module?
A: The module operates within a voltage range of 3.0V to 4.6V.
Q: What is the maximum RF transmit power?
A: The maximum RF transmit power is 13.5dBm.
Q: Does this module support advanced audio codecs?
A: Yes, it supports aptX Adaptive Lossless (R2.2) and Snapdragon Sound Gaming Codec.
Q: Is there noise suppression technology included?
A: Yes, it features cVc (Clear Voice Capture) noise suppression, including a 3-Mic cVc with Machine Learning-based noise suppression for earbud applications.
Q: What are the responsibilities of an OEM or integrator using this module?
A: OEMs and integrators are responsible for adhering to regulatory requirements, performing additional host regulatory testing, and obtaining necessary host approvals for compliance, especially concerning FCC Part 15 Subpart C (15.247).
Q: Can the module’s firmware be updated?
A: Yes, it supports over-the-air updates for ST Micro-based Earbud RDP cases.

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Bluetooth M odule
M odel: CTE_BT2
Version: V1.0

1. Int roduct ion
CTE Tech Corp. introduces t he pioneer of t he Bluet oot h5.3 modules ORS-M 81 which is a high performance, low power and compact solut ion. The Bluet oot h module provides a complete2.4GHz Bluetoot h system based on t he QCC5181 WLCSP chipset which is a single chip radio and baseband IC for Bluet oot h 2.4GH systems. This module is fully qualified single-chip dual mode Bluetoot h@v5.4 syst em.
2. Key Features
Earbud and Headset Applicat ions
Bluet oot h® v5.4 stack and profiles Qualcomm Bluet oot h High Speed Link Qualcomm TrueWirelessTM M irroring Feedforward, Feedback, and Hybrid Qualcomm ANC Qualcomm apt XTM Adapt ive audio, apt X Voice, and apt X Adapt ive 96
kHz, and apt X Adapt ive Lossless (R2.2), and Snapdragon Sound Gaming Codec
1-M ic, 2-M ic, or 3-M ic Qualcomm® cVcTM Echo Cancelling and Noise
Suppression (cVc). 3-M ic: Earbud Application only
3-M ic cVc wit h M achine Learning-based noise suppression Adapt ive Transparency Wind Noise Reduct ion M achine Learning Framework Bluet oot h Low Energy Audio Broadcast Receiver (BM R) Low Latency Gaming M ode for A2DP LE Audio Unicast M usic Receiver wit h Gaming mode, Call Terminal,
and Stereo Recording
LE Audio Gaming mode wit h Voice Back Channel M ult ipoint (BR/ EDR only) wit h Barge-In support and 3-way call holding M icrosoft Swift Pair Google Better Toget her, including Fast Pair and Audio Switching Tones and AAC Voice Prompt s Google Voice Assistant PTT AM A Voice Assistant WuW and TTT M Fi support (iAP2) Device Firmware Upgrade support and DFU over HID (ES qualit y) iAP2 (including GAIA framework) Wireless Debug Capabilit y Over t he air DFU (background and foreground): Earbud Applicat ion

only
Wireless device t est service for manufact uring Over t he air update for ST M icro-based Earbud RDP case In charger case pairing Charging Case Power Line Communicat ions using t he fast comms
sch em e Source Applicat ion
Bluet oot h® v5.4 stack and profiles Qualcomm Bluet oot h High Speed Link Bluet oot h Low Energy Audio Unicast Voice wit h call cont rol (CCP) Bluet oot h Low Energy Audio Unicast M usic wit h media cont rol (M CP) LEA Broadcast source support (TM AP and PBP) (CS qualit y) LE Audio Gaming mode wit h Voice Back Channel 19 ms LEA Gaming latency Volume cont rol using VCP DFU support apt X Adapt ive Lossless (R2.1/ R2.2)
Audio subsystem
Dual 32-bit Kalimba audio digit al signal processor (or processing) (DSP) cores wit h
flexible clocking from 2 M Hz t o 240 M Hz t o enable opt imizat ion of performance vs. power consumpt ion
DSPs execut e code from ROM and from program RAM OEM and t hird part y developed feat ures can execut e from program RAM 384 KB program RAM 1408 KB dat a RAM Applicat ion subsyst em Dual-core applicat ion subsystem 32/ 80 M Hz operat ion 32-bit Firmware Processor (reserved for system use)
Executes:
Bluet oot h upper stack Profiles House-keeping code 32-bit Developer Processor execut es: Developer applications Bot h cores execut e code from external flash memory using
QSPI clocked at 32 M Hz or 80 M Hz
On-chip caches per core enable opt imized performance

and power consumpt ion Bluet oot h subsystem
Qualified t o Bluetoot h v5.4 specificat ion including 2 M bps Bluet oot h Low Energy
and Bluet oot h Low Energy Isochronous Channels
Qualcomm® Bluetoot h High Speed Link Single ended ant enna connect ion wit h on-chip balun and Tx/ Rx switch Bluet oot h, Bluet oot h Low Energy, and mixed t opologies
support ed
Class 1 support
3. Applicat ions
Wired/ wireless stereo headset s/ headphones/ Dongle Qualcomm True WirelessTM stereo earbuds

4.General specifications

M odel Name Product Name Bluet oot h Standard Chipset Dim en sio n Operat ing Condit ions Vo lt age Temperat ure St orage Temperat ure Elect rical Specifications Frequency Range M aximum RF Transmit Power
/ 4 DQPSK Receive Sensitivit y
8DPSK Receive Sensit ivit y

CTE_BT2 Bluet oot h M odule Bluet oot h 5.4 QCC5181 WLCSP 17mm x 19 mm x 1.7mm
3.0V~4.6V
-40+85 -40+85
24022480M Hz
13.5dBm -94.5dBm -88dBm

5.M odule Package Information
5.1 Dimension Postage stamp hole

5.2 M odule Pin descriptions

5.3 Device Terminal Functions

6 Electrical Characteristics

6.1 Absolute M aximum Ratings

Rat ing St orage temperat ure

M inimum
-40

M aximum
+85

6.2 Recommended Operating Conditions

Operat ing Condit ion Operat ing temperat ure range Supply volt age: VBAT

M inimum
-40
+3.0V

M aximum
+85
+4.6V

7 Label
Laser engraving printing label

8 W ireless Certifications

Country

Mark

U.S

FCC ID: 2AS3E-CTEBT2

Canada

IC: 24983-CTEBT2

Europe

Taiwan

Japan

Korea

U. K

9 Warning
FCC Statement:
FEDERAL COM M UNICATIONS COM M ISSION INTERFERENCE STATEM ENT This equipment has been t ested and found t o comply wit h t he limit s for a Class B digit al device, pursuant to part 15 of t he FCC Rules. These limit s are designed to provide reasonable prot ect ion against harmful int erference in a residential installat ion. This equipment generates, uses and can radiat e radio frequency energy and, if not inst alled and used in accordance w it h t he inst ruct ions, may cause harmful int erference t o radio communicat ions. However, t here is no guarantee t hat interference will not occur in a part icular installat ion. If t his equipment does cause harmful interference t o radio or t elevision recept ion, which can be determined by t urning t he equipment off and on, t he user is encouraged t o t ry t o correct t he interference by one or more of t he following measures: -Reorient or relocat e t he receiving ant enna. -Increase t he separat ion bet w een t he equipment and receiver. -Connect t he equipment into an out let on a circuit different from t hat to w hich t he receiver is connect ed. -Consult t he dealer or an experienced radio/ TV t echnician for help.
CAUTION: Any changes or modificat ions not expressly approved by t he grant ee of t his device could void t he user’s aut horit y t o operate t he equipment .

This device complies w it h Part 15 of t he FCC Rules. Operat ion is subject t o t he follow ing t w o condit ions: (1) t his device may not cause harmful int erference, and (2) t his device must accept any int erference received, including int erference t hat may cause undesired operat ion.
RF Exposure warning This equipment must be installed and operat ed in accordance wit h provided inst ruct ions and t he antenna(s) used for t his t ransmitter m ust be installed to provide a separat ion distance of at least 20 cm from all persons and must not be co-located or operat ing in conjunct ion w it h any ot her antenna or t ransmitt er. End-users and inst allers must be provide wit h ant enna installat ion inst ruct ions and t ransmit ter operat ing condit ions for sat isfying RF exposure co m p lian ce.
Information for OEM s and host integrators The OEM or integrator is obligat ed to adhere to t hese requirement s and rest rict ions as a condit ion for using t he module’s cert ificat ion. The OEM or int egrator is responsible t o perform t he required addit ional host regulatory t est ing and/ or obt aining t he required host approvals for compliance.
2.2 List of applicable FCC rules This module has been t ested for compliance t o FCC Part 15 Subpart C (15.247).
2.3 Summarize t he specific operat ional use condit ions The module is tested for standalone mobile RF exposure use condition. Any other usage condit ions such as colocat ion wit h ot her t ransmit t er(s) will need a separate reassessment t hrough a class II permissive change applicat ion or new cert ificat ion.
2.4 Limit ed module procedures Not applicable, t his device is a single modular approval and meet s FCC 47 CFR 15.212 requirement .
2.5 Trace antenna designs
Not applicable. This module has its own antenna, and does not need a host ‘s printed board micro strip trace
antenna, etc.
2.6 RF exposure considerat ions This equipment complies wit h FCC mobile radiat ion exposure lim it s set fort h for an uncont rolled environment . This equipment should be inst alled and operated wit h a minimum distance of 20cm bet ween t he radiat or & your body. A separate SAR/ Power Density evaluat ion is required t o confirm compliance wit h relevant FCCport able RF exposure rules.
2.7 Ant ennas This module has been approved to operate wit h t he ant enna t ypes listed below, wit h t he maximum permissible

gain indicat ed.

No. M anufact urer

Part No.

Antenna Type Peak Gain (dBi) Freq. Range (GHz) Connector

Type

1

OpenRoad

66-040011

PIFA

3.3dBi

2.4GHz~2.5GHz

None

Solut ions,Inc IM PORTANT: The final host product must have an int egral ant enna which is not removable by t he end-user.

2.8 Label and compliance inform at ion Label of t he end product : The final end product must be labeled in a visible area wit h t he following: ” Contains FCC ID: 2AS3E-CTEBT2″. The grant ee’s FCC ID can be used only when all FCC compliance requirement s are met

2.9 Informat ion on t est modes and addit ional test ing requirement s
This transmitter is tested in a standalone mobile RF exposure condition and any co-locat ed or simult aneous t ransmission wit h ot her t ransmit t er(s) class II permissive change re-evaluat ion or new cert ificat ion.

2.10 Addit ional t est ing, Part 15 Subpart B disclaimer
This t ransmit t er module is t est ed as a subsyst em and it s cert ificat ion does not cover t he FCC Part 15 Subpart B (unint ent ional radiat or) rule requirement applicable t o t he final host . The final host w ill st ill need t o be reassessed for compliance to t his port ion of rule requirement s if
applicable. As long as all condit ions above are met , furt her t ransmit t er t est will not be required. However, t he OEM int egrat or is st ill responsible for t est ing t heir end-product for any addit ional compliance requirement s required w it h t his module inst alled.

IM PORTANT NOTE: In t he event t hat these conditions cannot be met (for example certain lapt op configurat ions or co-locat ion wit h anot her t ransmit t er), t hen t he FCC aut horizat ion is no longer considered valid and t he FCC ID cannot be used on t he final product . In t hese circumstances, t he OEM integrator will be responsible for reevaluat ing t he end product (including t he t ransmitter) and obt aining a separate FCC aut horizat ion.

M anual Information To the End User
The OEM int egrat or has t o be aw are not t o provide informat ion t o t he end user regarding how t o inst all or remove t his RF module in t he user’s manual of t he end product w hich int egrat es t his module.The end user manual shall include all required regulat ory informat ion/ w arning as show in t his manual.

OEM / Host manufacturer responsibilities
OEM / Host manufact urers are ult imat ely responsible for t he compliance of t he Host and M odule. The final product must be reassessed against all t he essent ial requirement s of t he FCC rule such as FCC Part 15 Subpart B before it can be placed on t he US market . This includes reassessing t he t ransmit t er module for compliance w it h t he Radio and EM F essent ial requirement s of t he FCC rules. This module must not be incorporat ed int o any ot her device or syst em w it hout ret est ing for compliance as mult i-radio and combined equipment .

IC Statement:

CAN ICES-003(B) / NM B-003(B)

Innovat ion,

Science

and

Canada(ISED) Compliance Statement

Economic

Development

This device complies wit h ISED’s licence-exempt RSSs. Operation is subject t o t he follow ing t wo condit ions: (1) This device may not cause harmful interference, and (2) t his device must accept any interference received, including int erference t hat may cause undesired operat ion.

Le présent appareil est conforme aux CNR d’ ISED applicables aux appareils radio exempt s de licence.
L’exploit at ion est autorisée aux deux condit ions suivantes : (1) le disposit if ne doit pas produire de brouillage préjudiciable, et (2) ce disposit if doit accept er t out brouillage reçu, y compris un brouillage suscept ible de provoquer un fonct ionnement indésirable.

Radiation Exposure Statement: This equipment complies wit h ISED radiat ion exposure lim it s set fort h for an uncont rolled environment . This equipment should be installed and operated wit h greater t han 20cm bet ween t he radiator & your body.
Déclaration d’exposition aux radiations: Cet équipement est conforme aux limit es d’exposit ion aux rayonnement s ISED ét ablies pour un environnement non cont rôlé. Cet équipement doit êt re inst allé et ut ilisé à plus de 20 cm ent re le radiat eur et vot re corps.
This device is intended only for OEM integrators under the follow ing conditions: 1) The ant enna must be inst alled and operat ed w it h great er t han 20cm bet w een t he ant enna and users, and 2) The t ransmit t er module may not be co-locat ed w it h any ot her t ransmit t er or ant enna. As long as 2 condit ions above are met , further t ransmit t er t est w ill not be required. How ever, t he OEM int egrat or is st ill responsible for t est ing t heir end-product for any addit ional compliance requirement s required w it h t his module inst alled. Cet appareil est conçu uniquement pour les intégrateurs OEM dans les conditions suivantes: (Pour utilisation de dispositif module) 1) L’ant enne doit êt re inst allé et exploit é avec plus de 20 cm ent re l’ant enne et les ut ilisat eurs, et 2) Le module émet teur peut ne pas êt re coïmplant é avec un aut re émet t eur ou ant enne. Tant que les 2 condit ions ci-dessus sont remplies, des essais supplémentaires sur l’émet t eur ne seront pas nécessaires. Tout efois, l’int égrat eur OEM est t oujours responsable des essais sur son produit final pour t out es exigences de conformit é supplément aires requis pour ce module inst allé.
IM PORTANT NOTE: In t he event t hat t hese condit ions cannot be met (for example certain lapt op configurat ions or colocat ion wit h anot her t ransmit t er), t hen t he Canada aut horizat ion is no longer considered valid and the IC ID cannot be used on t he final product . In t hese circumstances, t he OEM integrator will be responsible for reevaluat ing t he end product (including t he t ransmitter) and obt aining a separate Canada aut horizat ion.
IM PORTANTENOTE

Dans le cas où ces conditions ne peuvent être satisfaites (par exemple pour certaines configurations d’ordinateur port able ou de cert aines co-localisat ion avec un aut re émet teur), l’aut orisat ion du Canadan’est plus considéré comme valide et l’ID IC ne peut pas êt re ut ilisé sur le produit final. Dans ces circonst ances, l’int égrat eur OEM sera chargé de réévaluer le produit final (y compris l’émet teur) et l’obt ent ion d’une aut orisat ion dist inct e au Canada.
End Product Labeling This t ransmit ter module is aut horized only for use in device where t he ant enna may be installed and operated wit h great er t han 20cm bet ween t he ant enna and users. The final end product must be labeled in a visible area wit h t he following: ” Cont ains IC: IC: 24983-CTEBT2″.
Étiquetage du produit final Ce module émett eur est uniquement autorisé à êt re ut ilisé dans un appareil où l’antenne peut êt re installée de manière à ce que 20 cm puissent êt re maintenus entre l’antenne et les utilisateurs. Le produit final doit êt re ét iquet é dans une zone visible avec les informat ions suivant es: ” Cont ient le module d’émission IC: 24983-CTEBT2″.
M anual Information To the End User The OEM integrator has to be aware not to provide information to t he end user regarding how to inst all or remove t his RF module in t he user ‘s manual of t he end product which int egrates t his module. The end user manual shall include all required regulatory informat ion/ warning as show in t his manual.
M anuel d’information à l’utilisateur final L’intégrat eur OEM doit êt re conscient de ne pas fournir à l’ut ilisat eur final des informat ions concernant la procédure d’installat ion ou de suppression de ce module RF dans le manuel de l’ut ilisateur du produit final qui int ègre ce module. Le manuel de l’ut ilisateur final doit inclure tout es les informat ions / avert issement s réglement aires requis, comme indiqué dans ce manuel.
This radio t ransmit ter [IC: 24983-CTEBT2] has been approved by Innovation, Science and Economic Development Canada to operate wit h t he antenna t ypes listed below, wit h t he maximum permissible gain indicated. Ant enna types not included in t his list t hat have a gain greater t han the maximum gain indicated for any type listed are st rict ly prohibit ed for use wit h t his device.
This radio t ransmit ter [IC: 24983-CTEBT2] has been approved by Innovat ion, Science and Economic Development Canada to operate wit h t he antenna t ypes listed below, wit h t he maximum permissible gain indicated. Ant enna types not included in t his list t hat have a gain greater t han the maximum gain indicat ed for any t ype list ed are st rict ly prohibit ed for use wit h t his device.
Le présent émetteur radio [IC: 24983-CTEBT2] a été approuvé par Innovat ion, Sciences et Développem ent économique Canada pour fonct ionner avec les t ypes d’antenne énumérés ci dessous et ayant un gain admissible maximal. Les types d’antenne non inclus dans cette list e, et dont le gain est supérieur au gain maximal indiqué pour tout t ype figurant sur la list e, sont st rict ement int erdit s pour l’exploit at ion de l’émet t eur

No. M anufact urer

1

OpenRoad

Solut ions,Inc

Part No. 66-040011

Antenna Type Peak Gain (dBi) Freq. Range (GHz) Connector Type

PIFA

3.3dBi

2.4GHz~2.5GHz

None

IM PORTANT: The final host product must have an int egral ant enna which is not removable by t he end-user.
CE RED / UK RER Compliance Statement
EU Declaration of Conformity Hereby, CTETech Corp. declares t hat t he radio equipment t ype CTE_BT2 is in compliance wit h Direct ive 2014/ 53/ EU. The full t ext of t he EU declarat ion of conformit y is available at t he following int ernet address: htt ps:/ / w ww.ct etechcorp.com/ product / met er
RF Exposure warning This device meet s t he EU requirements (2014/ 53/ EU) on t he limit at ion of exposure of t he general public to elect romagnet ic fields by way of healt h prot ect ion. The device complies wit h RF specificat ions when t he device used at 20 cm from your body.

AT BE BG CH CY CZ DK DE EE EL ES FI FR HR HU IE IS IT LT LU LV M T NL PL PT RO SI SE SK NI

All operat ional modes:

Technologies

Frequency range (M Hz)

Bluet oot h EDR

2402-2480 M Hz

Bluet oot h LE

2402-2480 M Hz

M ax. Transmit Power

NCC

(OEM Integrator)(End Product): NCC : CCXXxxYYyyyZzW