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BK3266SO16A Datasheet(PDF) 12 Page - Beken Corporation |
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BK3266SO16A Datasheet(HTML) 12 Page - Beken Corporation |
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12 / 28 page  Low Power Bluetooth Audio SoC v 0.5 © 2017 Beken Corporation Proprietary and Confidential Page 12 of 28 3. Functional Description 3.1. Overview The BK3266 is a single-chip Bluetooth SoC offering advanced audio processing and low power consumption by utilizing dedicated hardware blocks such as a five band equalizer and a hardware accelerator to increase performance and offload the MCU. It has Bluetooth version 4.2 EDR stack and application profiles and can be used for both control and multimedia hybrid applications. The BK3266 includes a rich set of analog and digital peripherals that allow users to add features such as a microphone input, stereo line-in inputs, SDIO memory card, and an FM radio to a Bluetooth application enhancing overall user experience. 3.2. Modes of Operation The general operation of the BK3266 is as follows. After system reset, the BK3266 enters the low power standby mode waiting for external circuitry via the GPIO interface to wake the device up. Once the device is awake, it will establish a connection with other Bluetooth devices using the Inquire and Paging states. After a connection is made the device can be placed into Active or Sniff mode depending on the master Bluetooth device Shutdown – In this mode all circuits are powered down except for the GPIO15 interface to allow external circuitry to wake-up the device. Software can enter this mode by write special register and system can only be waked up by active level applied on GPIO15. Standby – In this mode all circuits are powered down except the GPIO interface and a timer active to allow external circuitry and internal timer to wake-up the device. This is the default low power state of the chip while it is waiting to be used. There is no interaction with any Bluetooth devices in this state. Active – During this mode, the BK3266 and the other connected Bluetooth device are actively receiving and transmitting data on the channel. This data can be high fidelity audio, voice, or control commands depending on the application. Sniff – In this mode, the device remains active but listens and communicates at a reduced rate. The device maintains connection with the master with its Active Member Address (AM_ADDR) and goes to sleep and wakes up at assigned Sniff Intervals to exchange packets with the master. Test – The BK3266 provides a test mode to test the internal RAM memory BIST and other blocks. The test mode is normally not used. 3.3. RF Transceiver The BK3266 integrates a high-performance Bluetooth transceiver and frequency synthesizer. The transceiver is fully differential and incorporates an integrated |
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