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XJ-B2A Module Series

XJ-B2A BLE mesh Standard Module (PCB Antenna)

XJ-B2A series of low-power Bluetooth module is a high-performance Bluetooth module which

is developed based on the Telink low-power Bluetooth SoC TLSR8250 chip. The module adopts the

stamp-type and side plug-in interfaces, is exquisite and compact, is fully lead out via ports and convenient

to use, and helps the users omit the complicated RF hardware design, development and production links.

Therefore, the users can easily realize the development of Bluetooth application programs on that basis,

shorten the R&D cycle, and seize the market opportunities. This model is a pure hardware module that

excludes any software. If you need the edition with software, please notify in advance.

Product Characteristics

Working Frequency Band

Working frequency band: 2402-2480MHz

Ultra-low Power Consumption

Support 1.8V-3.6V power supply

Emission current: ≤20mA (10dBm power

configuration)

Receiving current: ≤6.5mA (overall current)

Sleep current: 400nA (SRAM not saving)

High-link Budget

Sensitivity-96dBm±1dBm (1Mbps, PER<30.8%)

Emission power: Max.1.728dBm

Memory Resources

Internal 512kB Flash (the capacity that

the client can actually use is less than

512kB)

48kB on-chip SRAM, wherein 32kB can

sleep and save

Compatibility

Designed interface mode with side

plug-in and stamp holes compatible

Mesh Functions

Support BLE

Support the Bluetooth SIG Mesh

Support the exclusive Mesh of Telink

让生活更简单 | www.xiaojiang.cc

Summary of content (15 pages)

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让生活更简单 | www.xiaojiang.cc XJ-B2A Module Series XJ-B2A BLE mesh Standard Module (PCB Antenna) XJ-B2A series of low-power Bluetooth module is a high-performance Bluetooth module which is developed based on the Telink low-power Bluetooth SoC TLSR8250 chip. The module adopts the stamp-type and side plug-in interfaces, is exquisite and compact, is fully lead out via ports and convenient to use, and helps the users omit the complicated RF hardware design, development and production links.
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· Communication Interface - 5 PWM / 16 GPIO / 1 UART （ Pin multiplexing）
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让生活更简单 | www.xiaojiang.cc Thanks for choosing XiaoJiang products. Please read through this Manual before using the products. By using the products, you have understood and accept the terms and instructions in this Manual. Ningbo Xiaojiang IoT Technology Co.，Ltd reserves all legal rights to revise and explain the terms and information provided, without prior notices. Ningbo Xiaojiang IoT Technology Co.，Ltd provides this document to support the product design of users.
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让生活更简单 | www.xiaojiang.cc ORIGINAL EQUIPMENT MANUFACTURER (OEM) NOTES  The OEM must certify the final end product to comply with unintentional radiators (FCC Sections 15.107 and 15.109) before declaring compliance of the final product to Part 15 of the FCC rules and regulations. Integration into devices that are directly or indirectly connected to AC lines must add with Class II Permissive Change.  The OEMmust comply with the FCC labeling requirements.
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让生活更简单 | www.xiaojiang.cc (OEM) Integrator is reminded to assure that these installation instructions will not be made available to the end user of the final host device.
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让生活更简单 | www.xiaojiang.cc CONTENTS 1 Specifications & Parameters..................................................................................................................6 2 Dimensional Drawing and Pin Definitions........................................................................................... 6 2.1 Dimensional Drawing.................................................................................................................7 2.2 Pin Definitions.......................................
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让生活更简单 | www.xiaojiang.cc 1 Specifications & Parameters Table 1-1 Limit Parameters of Module Performance Parameters Remarks Min Max Supply voltage （V） -0.3 +3.6 Max voltage of input pins -0.3 VDD+0.3 Storage temperature（℃） -65 150 All AVDD and DVDD with same voltages Table 1-2 Working Parameters1 of Module Parameters Performance Remarks Min TYP Max Supply voltage（V） 1.8 3.3 3.6 Work temperature（℃） -40 - 85 -30 - +30 Below 25℃ 2.
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让生活更简单 | www.xiaojiang.cc Fig. 2-1 Physical Diagram of XJ-B2A Module Series * When this product is being designed, the resistance capacitor and PCB have optional material models, so their colors of appearance may be different on the premise that the performance requirements are met, and shall be subject to the physical products; please refer to Table 1-3 for the key materialsBOM.
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让生活更简单 | www.xiaojiang.cc 2.
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让生活更简单 | www.xiaojiang.
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让生活更简单 | www.xiaojiang.cc 3 Basic Operations 3.1 Pins When using the module, please choose the IO pin and carry out single-wire burning to the module according to the actual application. It is suggested leaving VCC, GND and SWS on the bottom plate for burning. Fig. 3-1 Typical Application Circuits 3.2 Notices to Hardware Layout 1.
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让生活更简单 | www.xiaojiang.cc Scheme 1: The PCB antenna is outside the board frame Fig. 3-2 The PCB antenna is outside the board frame Scheme 2: The PCB antenna is placed along the board side and its lower part is hollowed Fig. 3-3 The PCB antenna is placed along the board side and its lower part is hollowed Scheme 3: The PCB antenna is placed along the board side and is not clad with copper Fig.
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让生活更简单 | www.xiaojiang.cc 4 Common Problems 4.1 Communication Failure of Module in Near Distance  Make sure the sending and receiving configuration is consistent, because inconsistent configuration will disenable normal communication.  Abnormal voltage: Too low voltage will lead to abnormal sending.  Low battery: when in low battery, the voltage will be reduced at the time of sending which will cause abnormal in sending.
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让生活更简单 | www.xiaojiang.cc FCC Statement： This device complies with part 15 of the FCC rules Operationis 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. NOTE: The manufacturer is not responsible for any radio or TV interference caused by unauthorized modifications to this equipment.
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让生活更简单 | www.xiaojiang.cc 5 Production Guide 5.1 Production Guide It is suggested processing SMT machine patch on the stamp tear sealing module, and finishing it within 24 hours after unpacking. Otherwise, please vacuumize and package again, so as to prevent the problem that the patch processing effect is poor due to damp. If there is a humidity indicator card in the package, it is suggested judging if the module needs to be baked according to the indication of the humidity card.