example when the supply voltage to the module experiences a Brown- Out (momentary dip in the supply voltage level), or a rapid power cycle i.e. the power is switched off and then on within 1second, there is a possibility that the module can enter an unknown state of operation.

It is strongly recommended that the application hardware onto which the module is mounted provides a Power-On-Reset circuit with a Brown-Out detection capability. This will guarantee that under all circumstances the module will operate in a known state.

A device such as the Maxim MAX6382XR26D3-T would be a suitable part to perform the reset – it has an active high push-pull output, a 2.63V detection threshold, and an active reset period of 140ms. This inexpensive device is available in a SC70-3 package (2.2mm x 2.4mm) and requires no additional components to operate. The device is used to monitor the output of the voltage regulator on the module (through pin 27), and drives the Reset line (pin13) high when the supply voltage falls out of tolerance. The schematic below illustrates its use.

Please note that this 3V3 is the output of the 3V3 regulator on the blu2i Module and should not be connected to any other supplies on the application hardware.

BC02 3V3

3

Vcc

MAX6382

Gnd

Reset

 

 

 

 

 

 

1

 

2

 

 

 

 

 

 

BC02 MRESET

blu2i Module

Pin27

Pin13

10K

GND

GND

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TDK blu2i manual Blu2i Module
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blu2i specifications

The TDK Blu2i is an innovative Bluetooth audio device designed to elevate the listening experience for audiophiles and casual listeners alike. This versatile device combines advanced Bluetooth technology with high-quality audio performance to create an outstanding solution for wireless sound.

One of the standout features of the TDK Blu2i is its compatibility with various Bluetooth profiles, allowing it to seamlessly connect with a wide range of devices, including smartphones, tablets, and laptops. Utilizing the latest Bluetooth 5.0 technology, the Blu2i ensures a stable connection, reduced latency, and an extended range, making it ideal for both indoor and outdoor use.

In terms of audio performance, the TDK Blu2i boasts impressive sound quality. The device supports high-resolution audio streaming, delivering superior clarity and detail. Users can enjoy their favorite tracks with deep bass, crisp highs, and an overall balanced sound profile. The built-in digital signal processing (DSP) enhances audio playback, ensuring that every note is rendered with precision.

Another notable characteristic is the TDK Blu2i's long-lasting battery life. With up to 20 hours of playback on a single charge, users can indulge in extended listening sessions without worrying about frequent recharging. The device also features quick charge capability, allowing users to enjoy several hours of playback with just a short charging session.

The design of the TDK Blu2i is both stylish and functional. Its compact and lightweight form factor makes it easy to carry, while its durable construction ensures it can withstand everyday use. The device is equipped with intuitive controls, allowing users to adjust volume, skip tracks, and manage calls effortlessly.

Additionally, the TDK Blu2i supports voice assistant integration, enabling users to access their smart devices hands-free. This feature adds an extra layer of convenience, allowing for seamless multitasking without the need to reach for a phone.

In summary, the TDK Blu2i is a powerful Bluetooth audio device that encapsulates the essence of modern audio technology. With its high-quality sound, extensive battery life, and user-friendly features, it caters to the needs of any audio enthusiast looking for a reliable and high-performing wireless solution.
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