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User Manual for Wi-linktech models including: WLT3266H Dual Mode Bluetooth Module, WLT3266H, Dual Mode Bluetooth Module, Mode Bluetooth Module, Bluetooth Module
Wi-linktech Communication Technologies (Shanghai) Co.,Ltd WLT3266H 3266H-J,3266H 2AOO6-WLT3266H 2AOO6WLT3266H wlt3266h
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DocumentDocument() Wi-linktech Communication Technologies (Shanghai) Co.,Ltd. WLT3266H dual-mode Bluetooth module Product Specifica tion V2.1 021-20255077 () Wi-linktech Communication Technologies (Shanghai) Co.,Ltd. catalogue 1 Overview ................................................................................................................... 1 1.1 Functional feature ..................................................................................... 1 1.2 Application Area ........................................................................................ 1 2 Electrical characteristics ................................................................................ 2 2.1 Basic Features ............................................................................................. 2 2.2 IO Performance .............................................................................................. 2 2.3 Bluetooth RF Performance ......................................................................... 3 3 Hardware Introduction .......................................................................................... 4 3.1 Functional Block Diagram ......................................................................... 4 3.2 Module size and pin layout ..................................................................... 5 3.3 Pin Definition ............................................................................................. 6 3.4 Refer to schematic diagram ..................................................................... 7 4 PCB Design ........................................................................................................... 8 4.1 Recommended pad size ................................................................................ 8 4.2 PCB layout precautions ............................................................................ 8 5 Recommended reflux parameters ............................................................................ 9 6 Software Applications ........................................................................................ 10 021-20255077 1 summary () Wi-linktech Communication Technologies (Shanghai) Co.,Ltd. WLT3266H is an audio Bluetooth module developed by Weilingtong Company, which has a built-in Bluetooth audio protocol stack and various applications Profile can easily achieve the interconnection, data transmission, voice, music and other applications of user Bluetooth devices. 1.1 Functional characteristics Complies with Bluetooth V5.1+BR+EDR+BLE specifications Supports Bluetooth HFP, A2DP, SPP, AVRCP Supports transparent/protocol data transmission mode, provides AT+instruction set configuration, supports UART communication interface, and UART interface supports DMA mode. Built in 16 bit audio DAC and 16 bit audio ADC Built in Capless headphone amplifier with built-in MIC bias and amplification circuit supporting analog audio input Supports offline speech recognition, using the latest neural network (TDNN) algorithm with advantages such as accurate recognition and low misjudgment rate. Reliable recognition at a distance of 5 meters provides+6dbm transmission power Receiver with -90dBm sensitivity Board mounted PCB antenna, customers can also connect an external antenna with a single power supply of 2.2-5.5V Stamp hole pins are easy and reliable to weld. Ultra small size: 13x27.2mm Flexible software platform, providing customized services 2022-07-18 www.wi-linktech.com 021-20255077 1 / 11 () Wi-linktech Communication Technologies (Shanghai) Co.,Ltd. 1.2 application area Bluetooth Speaker Bluetooth Music Forwarder Car Bluetooth Handsfree Health Care Smart toys Intelligent Bathroom, Intelligent Lighting, Intelligent Electromechanical, Intelligent Home Smart home appliances (household appliances, health appliances, kitchen appliances, etc.) 2022-07-18 www.wi-linktech.com 021-20255077 2 / 11 () Wi-linktech Communication Technologies (Shanghai) Co.,Ltd. 2 Electrical characteristics 2.1 Basic characte ristics parameter Power supply voltage Table 1 Electrical characteristics ident ifica tion VBAT mini typi maximu unit mum cal m 3.7 4 5.5 V 3.3V power output capacity Storage temperature range Working temperature range I3.3 TSTR -65 TOPR -20 one MA hundre d and fifty one ° C hundre d and fifty seventy ° C 2.2 IO perfor mance Table 2. IO Input/Output Electrical Logic Characteristics IO input characteristics symbol meaning Low Level Input VIL Voltage High Level Input VIH Voltage IO output characteristics Low Level output Vo L Voltage High Level output Vo H Voltage mini mum -0.3 0.7* VDDIO typi maximum unit cal 0.3* V VDDIO VDDIO+0.3 V two point seven zero point V three three V 2022-07-18 www.wi-linktech.com 021-20255077 Test conditions VDDIO=3.3V VDDIO=3.3V VDDIO=3.3V VDDIO=3.3V 3 / 11 Port PA0, PA1 PB1, PB8~PB10 PB11 Output0 PC7 Output1 PB5 USBDP USBDM () Wi-linktech Communication Technologies (Shanghai) Co.,Ltd. Table 3. Internal Resistor Characteristics General Output High Drive Internal Pull Up Resistor Internal Pull Down Resistor Comment 8mA 24mA 10K 8mA 24mA 10K 8mA 64mA 8mA 8mA 10K 4mA 1.5K 4mA 180K 10K 1. PB1 default pull-up 2. USBDM&USBDP default dropdown 3. PB5 can be pulled up 10K externally 5V 10K 4. Internal resistance accuracy ± 20% 15K 15K 2.3 Bluetooth RF performance Transmitters Basic Data Rate paramete r RF Transmit Power RF Power Control Range 20dB Bandwidth Adjacent Channel Transmit Power +2MHz -2MHz +3MHz -3MHz Table 4. BT Characteristics minim um typi cal four twent y nine hundr ed and fifty -40 -38 -44 -35 maxi mum six unit DBm DB KHz DBm DBm DBm DBm Test conditions 25 , Power Supply VBAT=5V 2441MHz Enhanced Data Rate paramete r Relative Power /4 DQPSK DEVM RMS 2022-07-18 minim typi um cal -1 six maxim unit um DB % Test conditions www.wi-linktech.com 021-20255077 4 / 11 Modulation Accuracy Adjacent Channel Transmit Power () Wi-linktech Communication Technologies (Shanghai) Co.,Ltd. DEVM 99% ten % DEVM Peak fifteen % 25 , +2MHz -40 DBm Power Supply -2MHz -38 DBm VBAT=5V +3MHz -44 DBm 2441MHz -3MHz -35 DBm 2022-07-18 www.wi-linktech.com 021-20255077 5 / 11 () Wi-linktech Communication Technologies (Shanghai) Co.,Ltd. Receiver Basic Data Rate and Enhanced Data Rate paramete r minim typi um cal Sensitivity -90 Co channel Interference Rejection -13 +1MHz +5 -1MHz +2 +2MHz +37 Adjacent Channel -2MHz +36 Transmit Power +3MHz +40 -3MHz +35 maxim unit um DBm DB DB DB DB DB DB DB Test conditions 25 , Power Supply VBAT=5V 2441MHz 3 Hardware Introduction 3.1 Functional Block Diagram 2.4GHz Figure 1. WLT3266H Module Principle Block Diagram 2022-07-18 www.wi-linktech.com 021-20255077 6 / 11 () Wi-linktech Communication Technologies (Shanghai) Co.,Ltd. There are three main parts inside the WLT3266H module: 1. Bluetooth part: includes Bluetooth chip, 2.4GHz PCB antenna, and external interface. 2. Speech recognition part: offline speech recognition algorithm, speech denoising algorithm, audio decoding. 3. Audio part: WLT3266H integrates Audio Codec, providing analog audio input and output, digital audio input and output, headphone amplifier, etc., supporting Bluetooth HFP, A2DP (Source and Sink) and other audio applications. 3.2 Module size and pin layout Figure 2 WLT3266H Module Dimensional Drawing (Front) 2022-07-18 Figure 3 WLT3266H module thickness www.wi-linktech.com 021-20255077 7 / 11 () Wi-linktech Communication Technologies (Shanghai) Co.,Ltd. 3.3 Pin Definition Pin# one two three four five six seven eight nine ten eleven twelve thirtee n fourtee n fifteen Name UART_ TX UART_ RX NC GND NC PB11 NC NC NC Vcharge PB1 VCC GND USBDM USBDP Type I/O I/O POWER I/O I/O I/O POWER POWER I/O I/O sixteen LINEIN_ L I/O sevent een eightee n ninetee n twenty twenty -one twenty -two twenty -three twenty -four twenty -five twenty -six LINEIN_ R DACL DACR NC NC NC MICROP PB8 ANT GND I/O O O I I/O POWER Description UART1_ TXD/AMUX0L/TOUCH0/CLKOUT0/PWMCHOH UART1_ RXD/AMUX0R/ADC0/TOUCH1/PWMCH0L No Connect Ground No Connect SDC Power Gate No Connect No Connect No Connect PWM3/CAP1/UART0TXC/UAT0RXC/Charge Power 5V ADC5/TMR2/UART1RXA/Long Press Reset Power supply Ground UART1RXD/SPI2DOB/I2C_ SDA_ A UART1TXD/SPI2CLKB/I2C_ SCL_ A/ADC12 AMUX2L/SD0CLKB/SPI2CLKA/CAP0/ UART2TXC/PWMCH3H AMUX2R/SD0CMB/SPI2DOA/ADC9/UART2RXC/PWMCH3L DAC Left Channel DAC Right Channel No Connect No Connect No Connect MIC Input Channel AMUX1R/SD0DAT0B/SPI2DIA/ADC8/CLKOUT1 ExternalANTPIN Ground Table 5 Pin Definition 2022-07-18 www.wi-linktech.com 021-20255077 8/ 11 () Wi-linktech Communication Technologies (Shanghai) Co.,Ltd. 3.4 Reference schematic Figure 4 WLT3266H module pin diagram 2022-07-18 Figure 5 WLT3266H Reference Design www.wi-linktech.com 021-20255077 9/ 15 () Wi-linktech Communication Technologies (Shanghai) Co.,Ltd. pad size 4.1 Recommended 4PCB design Figure 6 WLT3266H Package Size Reference 4.2 PCB layout precautions Bluetooth operates at a frequency of 2.4GHz, and various factors should be avoided as much as possible to affect wireless transmission and reception. Pay attention to the following points: 1. Avoid using metal for the product casing of the enclosure module. If the casing is metal, consider using an external antenna. 2. The internal metal screws of the product should be kept away from the RF part of the module. 3. The module should be placed around the motherboard, with the antenna part at the edge or corner. Copper or wiring is not allowed in the motherboard area below the module antenna. 5 Recommended reflux parameters The reflux parameters can refer to the following settings: 2022-07-18 www.wi-linktech.com 021-20255077 10/15 () Wi-linktech Communication Technologies (Shanghai) Co.,Ltd. Figure 7 Reflow recommendation curve Temperature range Preheat zone (<150 ) Uniform temperature zone (150-200 ) Circulation zone (>217 ) Cooling zone Time Key parameters 60-120S Ramp up rate: 2S 60-120S Ramp up rate:<1S 40-60S Peak: 240-260 Ramp down rate: 1 /s Slope 4 /s Table 8 Reflow recommendation parameters 2022-07-18 www.wi-linktech.com 021-20255077 11/ 15 () Wi-linktech Communication Technologies (Shanghai) Co.,Ltd. 6 Software applications WLT3266H is an audio Bluetooth module that supports Audio Codec. The module integrates an audio Bluetooth protocol stack, supporting various traditional Bluetooth applications and low-power Bluetooth applications. For example, HFP, A2DP, AVRCP, etc. The WLT3266H module supports the AT+command mode of UART port for configuration and operation mode selection. For specific command details, please refer to the application documentation of the relevant WLT3266H module software. The WLT3266H module supports customer software customization. Please contact our company for details. 7 Regulatory Module Integration Instructions List of applicable FCC rules This device complies with part 15 of the FCC Rules. Limited module procedures Not applicable Summarize the specific operational use conditions This module can be applied in remote Bluetooth Speaker, Bluetooth music transponder Car and Bluetooth hands-free Health , Wireless POS , Portable printer as well as smart home. The input voltage to the module should be nominally 3.7-5.5 V DC typical value 4V DC and the ambient temperature of the module should not exceed 80. RF exposure considerations This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment .This equipment should be installed and operated with minimum distance 5mm between the radiator& your body. If the device built into a host as a portable usage the additional RF exposure evaluation may be required as specified by 2.1093. 2022-07-18 www.wi-linktech.com 021-20255077 12 /15 () Wi-linktech Communication Technologies (Shanghai) Co.,Ltd. FCC Radiation Exposure Statement This modular complies with FCC RF radiation exposure limits set forth for an uncontrolled environment. This transmitter must not be co- located or operating in conjunction with any other antenna or transmitter. Label and compliance information If the FCC identification number is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. This exterior label can use wording such as the following: "Contains Transmitter Module FCC ID: 2AOO6-WLT3266H Or Contains FCC ID: 2AOO6-WLT3266H" When the module is installed inside another device, the user manual of the host must contain below warning statements 1. 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. (2) This device must accept any interference received, including interference that may cause undesired operation. 2. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. The devices must be installed and used in strict accordance with the manufacturer's instructions as described in the user documentation that comes with the product Additional testing Part 15 subpart B disclaimer The final host / module combination need to be evaluated against the FCC Part 15B criteria for unintentional radiators in order to be properly authorized for operation as a Part 15 digital device . The host integrator installing this module into their product must ensure that the final composite product complies with the FCC requirements by a technical assessment or evaluation to the FCC rules including the transmitter operation and should refer to guidance in KDB 996369. 2022-07-18 www.wi-linktech.com 021-20255077 13/15 () Wi-linktech Communication Technologies (Shanghai) Co.,Ltd. Frequency spectrum to be investigated For host products with certified modular transmitter the frequency range of investigation of the composite system is specified by rule in Sections 15.33(a(1 through (a(3 or the range applicable to the digital device as shown in Section 15.33(b(1 whichever is the higher frequency range of investigation. FCC Statement Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the 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 operatio. 2022-07-18 www.wi-linktech.com 021-20255077 14/15 Update logs Update date August 24, 2022 September 14, 2022 () Wi-linktech Communication Technologies (Shanghai) Co.,Ltd. person nel Neve LV Neve LV vers ion V2.0 V2.1 Update content Pin Definition Modify pin definitions and characteristic tables 2022-07-18 www.wi-linktech.com 021-20255077 15 /15