Jiangsu Tech Leading Information Technology EW-BLED-26 Bluetooth Module User Manual

Jiangsu Tech Leading Information Technology EW-BLED-26 Bluetooth Module User Manual

About this Manual

<< EW‐BLED‐26 Module Specifications>> provides an introduction to the basic functions of the EW‐BLED‐26 module, including its electrical specifications, RADIO frequency performance, pin size, and reference schematic design. Readers can refer to this document for a detailed understanding of the overall functional parameters of the module.

Revision history

Rev. Information management

Profile

Features

EW‐BLED ‐26 is a small and low‐cost BT and BLE 5.0 dual‐mode Bluetooth module developed by

Jiangsu Tech‐leading Co., Ltd.

The features of this module are as follows：

Built‐in high performance RISC 32‐bit CPU, 160MHz main frequency, 512KB Flash, 128KB RAM

Meet Bluetooth 5.0 standard, support 1 Mbps, 500 Kbps,125 Kbps rate

Transmitting power: BLE:4.82dBm; BR(GFSK):0.24dBm; EDR(π/4-DQPSK):1.02dBm .

Receiving sensitivity: The receiving sensitivity reaches ‐94dBm in 125Kbps mode

Support USB, UART, ADC, SPI, PWM and other interfaces

Support FTMS protocol, can be customized according to the customer communication protocol

Support true random number generator

Support BT classic Bluetooth and BLE data Bluetooth dual ‐ mode operation On‐ board high performance PCB antenna

Stamp hole pin, easy and reliable welding

Ultra‐small package：11.2x16mm

Ultra‐wide supply voltage：2.2V-5.5V

Working temperature：-20℃ ~ + 70℃

The EW‐BLED‐26 module needs to connect the four lines of VCC,GND,TX and RX to complete the data transmission and communication function, and can customize the specific communication protocol and customization function under the specific application environment according to the needs of customers. After the module is configured, you can use relevant hand software to test the communication data function. Users can conduct Bluetooth connection and communication test through the commonly used mobile Bluetooth communication test tool. BT audio transmission can be directly connected to the two channels of DAC R and L of the test module through the mobile Bluetooth for audio signal output. Tech‐leading company has been engaged in the field of Bluetooth for many years, and has strong research and development strength. It can easily realize the interconnection, data transmission and other various applications of users’ Bluetooth devices.Our company can customize and design the Bluetooth module according to customers’ requirements based on the EW‐BLED ‐26 dual mode Bluetooth module and provide corresponding software and hardware support.

Application Scope

IoT devices; Fitness equipment: treadmill, rhythm machine, etc

Electrical specifications

Absolute Maximum Ratings

Attention:
The electrical characteristics listed are target specifications for reference only. Some of the data may be updated based on actual test results
The voltage values shown are based on GND in the module. Any voltage exceeding the “maximum rating” may cause permanent damage to the equipment.

Recommended Operating Conditions

Power Consumption

Audio CODEC

Digital to Analogue Converter(Mono)

PARAMETER| CONDITIONS| MIN| TYP| MAX| UNIT
Resolution| ‐| ‐| ‐| 20| Bits
Sampling frequency| The synchronized clock| 8| | 48| kHz
SNR (Signal to Noise Ratio)| Fin=1kHz B/W=20Hz—20KHz A‐Weighted THD_N<0.01% Fs(8K,16K,32K,44.1K,48K)| | 92| | dB
Digital Gain| Digital Gain| ‐48| | 32| dB
Analogue Gain| Analog Gain Resolution =| 0| | ‐30| dB
Output voltage| VDDA=2.9V| | 1500| | mV
Stopband attenuation| | 65| | | dB
Analog to Digital Converter(Mono)
PARAMETER| CONDITIONS| MIN| TYP| MAX| UNIT
Resolution| ‐| ‐| ‐| 16| Bits
Sampling frequency| The synchronized clock| 8| | 48| kHz
Signal to Noise Ratio| A‐weighted| | 79| | dBFS
W/O weighting| | 79| | dBFS
Digital Gain| Digital Gain| ‐48| | 32| dB
Analogue Gain| Analog Gain Resolution =| 0| | 30| dB

Pins description

Pins distribution

Figure 3-1 Module pins figure

Note: Figure 3‐1 Pin functionality can be redefined by pin reuse

Pins definition

10

|

PB3

|

I/O

|

SD0DAT/AUX2R/PWM2

11| PB6| I/O| AUX2L
12| PB2| I/O| SPI2DIA/ UART2TXC/ SPI0_CLKB
13| VCC| POWER| Power supply 2.2-5.5V, typical value 3.3V
14| PR2| I/O| RESET1/ADC12
15| PR2| I/O| RESET2
16| PB0| I/O| ADC6/PWMH2L/TXD
17| PB1| I/O| ADC7/RXD
18| GND| GND| GND of module
19| VDDIO| IO POWER| VDDIO
20| PB5| I/O| SD0CLK/AUX0R/ADC9
21| PB4| I/O| SD0CMD/AUX0L/ADC8/PWM3

Module size

Top View (Seen from Top) Bottom View (Seen from Bottom)

Module thickness

Note: Tech‐Leading company reserves the right to select components from different suppliers to realize the function of modules. All mechanical, electrical specifications and module certifications are maintained. All dimensions are in mm (mm)

Table 4-3 Module design size

2.50 mm typical

Attention

Bluetooth works at the frequency of 2.4GHz, so the influence of various factors on the wireless transceiver should be avoided as far as possible. Please note the following points：

Avoid using metal as part of the product housing surrounding the module. If the housing is metal, consider using an external antenna

The metal screws inside the product should be kept away from the RF part of the module

To maximize RF performance, the user main board layout should follow the following recommendations：

Antenna clearance area: the user’s main board located directly below the module antenna area shall not have any copper foil wiring, including power supply, ground and signal laye0

Module location: Ideally, the module should be placed in a corner of the user’s motherboard. The PCB antenna is located at the far end of the motherboard. This position minimizes the antenna clearance area。

(Refer to the following figure for the definition of antenna clearance area）

Antenna Keep out

Reference PCB packaging

Reference packaging size

Reflow parameter recommendation

Figure 5‐1 Recommended reflow curve

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 operation.

OEM Guidance

1. Applicable FCC rules
   This module is granted by Single Modular Approval. It complies to the requirements of FCC part 15C, section 15.247 rules.

2. The specific operational use conditions
   This module can be used in IoT devices. The input voltage to the module is nominally 3.3V DC. The operational ambient temperature of the module is -20 to 70 degree C. Only the embedded PCB antenna is allowed. Any other external antenna is prohibited.

3. Limited module procedures
   N/A

4. Trace antenna design
   N/A

5. RF exposure considerations
   The equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment.
   This equipment can operated with minimum distance 5mm between the radiator and your body

6. Antenna
   Antenna type: PCB antenna; Antenna Gain: 0 dBi

7. Label and compliance information
   An exterior label on OEM’s end product can use wording such as the following: “Contains Transmitter Module FCC ID: 2AXDJ-EW-BLED-26” or “Contains FCC ID: 2AXDJ-EW-BLED-26”

8. Information on test modes and additional testing requirements
   a ) The modular transmitter has been fully tested by the module grantee on the required number of channels, modulation types, and modes, it should not be necessary for the host installer to re-test all the available transmitter modes or settings. It is recommended that the host product manufacturer, installing the modular transmitter, perform some investigative measurements to confirm that the resulting composite system does not exceed the spurious emissions limits or band edge limits (e.g., where a different antenna may be causing additional emissions).
   b) The testing should check for emissions that may occur due to the intermixing of emissions with the other transmitters, digital circuitry, or due to physical properties of the host product
   (enclosure). This investigation is especially important when integrating multiple modular transmitters where the certification is based on testing each of them in a stand-alone configuration. It is important to note that host product manufacturers should not assume that because the modular transmitter is certified that they do not have any responsibility for final product compliance.
   c) If the investigation indicates a compliance concern the host product manufacturer is obligated to mitigate the issue. Host products using a modular transmitter are subject to all the applicable individual technical rules as well as to the general conditions of operation in Sections 15.5, 15.15, and 15.29 to not cause interference. The operator of the host product will be obligated to stop operating the device until the interference have been corrected .

9. Additional testing, Part 15 Sub part 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. 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 When testing the host product, all the transmitters must be operating. The transmitters can be enabled by using publicly available drivers and turned on, so the transmitters are active. In certain conditions it might be appropriate to use a technology- specific call box (test set) where accessory 50 devices or drivers are not available. When testing for emissions from the unintentional radiator, the transmitter shall be placed in the receive mode or idle mode, if possible. If receive mode only is not possible then, the radio shall be passive (preferred) and/or active scanning. In these cases, this would need to enable activity on the communication BUS (i.e., PCIe, SDIO, USB) to ensure the unintentional radiator circuitry is enabled. Testing laboratories may need to add attenuation or filters depending on the signal strength of any active beacons (if applicable) from the enabled radio(s). See ANSI C63.4, ANSI C63.10 and ANSI C63.26 for further general testing details. The product under test is set into a link/association with a partnering device, as per the normal intended use of the product. To ease testing, the product under test is set to transmit at a high duty cycle, such as by sending a file or streaming some media content.

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