2.4 SPI Bus

The module is a slave device that uses terminals SPI_MOSI, SPI_MISO, SPI_CLK and SPI_CSB. This interface is used for program firmware update.

Note: The designer should be aware that no security protection is built into the hardware or firmware associated with this port, so the terminals should not be permanently connected in a PC application.

2.5 Parallel PIO Port

Five lines of programmable bi-directional input/outputs (I/O) are provided. GPIO[1:5] are powered from VCC. The mode of these lines can be configured and the lines are accessed via S Registers 621 to 625.

Auxiliary functions available via these pins include an 8-bit ADC and an 8-bit DAC. This function is not implemented at this time.

2.6 PCM Codec Interface

PCM_OUT, PCM_IN, PCM_CLK and PCM_SYNC carry up to three bi- directional channels of voice data, each at 8K samples/s. The format of the PCM samples can be 8-bit A-law, 8-bit µ-law, 13-bit linear or 16-bit linear. The PCM_CLK and PCM_SYNC terminals can be configured as inputs or outputs, depending on whether the module is the Master or Slave of the PCM interface.

The blu2i module is compatible with the Motorola SSI TM interface and interfaces directly to PCM audio devices including the following:

•Qualcomm MSM 3000 series and MSM 5000 series CDMA baseband devices

•OKI MSM7705 four channel A-law and µ-law CODEC

•Motorola MC145481 8-bit A-law and µ-law CODEC

•Motorola MC145483 13-bit linear CODEC

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TDK blu2i manual SPI Bus, Parallel PIO Port, PCM Codec Interface
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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.

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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.

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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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