TDK blu2i manual Modem signalling over Bluetooth, Break signal on RX line

Page 25

specified in S Register 519 then the connection is dropped as if an ATH command was received.

2PIO2 (RI), is normally deasserted. When an incoming connection is detected it will be asserted, until the connection is either answered or rejected using ATA and ATH respectively. See S Registers 552 & 553 for more details

3PIO3 (DCD) will be deasserted when the device is in the unconnected state. Asserted when a connection is active. See S Registers 552 and 553 for more details.

4PIO5 is either used as GPIO or driven as UART_DTR. When the unit is configured in pure host mode, this pin is forced into UART_DTR and is asserted when there is a Bluetooth connection.

GPIO Pins 1,2,3,4 and 5 are available for general purpose use.

6.1 Modem signalling over Bluetooth

The RFCOMM protocol used in Bluetooth for implementing the serial port profile allows for the exchange of four modem signals. This information is contained in a special transparent message which contains bits identified as RTR, RTC, DV and IC which depending on the type of serial device being emulated maps to DTR or DSR, RTS, DCD and RI respectively. In addition, this message also includes the ability to convey a BREAK input from one end to the other.

So to allow for the greatest flexibility and variability in how the modem control signals are used out in the real world, S Registers 551, 552 and 553 have been provided which allow for any of RTR,RTC,DV and IC to be mapped to any modem control/status line.

6.2 BREAK signal on RX line

If the host sends a break signal of duration greater than 100ms, then the blu2i module is configured to treat that as a signal to perform a hardware reset.

This being the case it is not possible to convey a BREAK over Bluetooth to the peer device.

25 of 36

Page 24 Page 26
Image 25
Page 24 Page 26
Contents Blu2i Module User Guide Contents Before You Begin Safety GuidelinesRF Approvals Functions Feature ImplementationSerial Interface Application InterfaceDetails the power consumption in different modes Power SupplyBlu2i Module Parallel PIO Port SPI BusPCM Codec Interface Pin Signal Description Electrical specification of the interfacePage Function Signal Name Pin No Signal level Comments Electric CharacteristicsUSB D Mechanical Dimensions Physical CharacteristicsMounting the blu2i Module onto the application platform Board to Board ConnectorPart number Stacking height HRS number Parameter Specification 40 pin Board to Board connector Operating temperatures Electrical and radio characteristicsPower Consumption Absolute Maximum ratingsATD Baud rate 9600 38400 115200 460800 Low Power Modes using Sniff High Power Consumption 2Receive Sensitivity RF performance 5.5.1Transmit Power4Performance against Temperature Parameter Minimum Maximum ReliabilityDirection Connector Pin Label Function RS232 Modem SignalsDirection Function Break signal on RX line Modem signalling over BluetoothReset Data Cable Pure Cable Replacement ModeATS512=3 ATS0=-1 Audio CableATS512=1 ATS504=1 ATS530=2000 ATS532=1 Modem Control and Status SignalsATS0=1 Getting StartedATDbdaddr AT+BTP Software Factory Default ModeBaud rate 300 to Parity Europe EU Declaration of Conformity Appendix aFCC and Industry Canada Statements ESD Electrostatic Discharge Appendix BAdditional Statement Warranty

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.
Top Page Image Contents