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BK3266TS28 Datasheet(PDF) 15 Page - Beken Corporation |
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BK3266TS28 Datasheet(HTML) 15 Page - Beken Corporation |
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15 / 28 page  BK3266 Datasheet v 0.5 © 2017 Beken Corporation Proprietary and Confidential Page 15 of 28 3.5.5. Stereo Audio L/R Outputs BK3266 provides high fidelity stereo audio L/R outputs capable of driving 16 Ω speakers with up to 30 pF of load capacitance. 3.6. MCU The BK3266 includes a 32-bit internal RISC MCU, memory and a DMA bus controller to run the Bluetooth software stack and application while supporting efficient execution and data exchange with the internal SIP FLASH memory. The JTAG interface can be used for on-line debug and can also be configured as GPIO. 3.7. FLASH Access Interface BK3266 internal RISC MCU operates with an external FLASH， which is used to store program code, external settings and configurations, and can also be used to store user data such as encryption key configuration and Bluetooth paring information. 3.8. Beken Bluetooth Software Stack The BK3266 comes with Bluetooth version 4.2 + EDR compliant software stack which run on the internal 32-bit RISC MCU. The SoC also runs the application program removing the need for an external host controller. An external host can be connected through the UART interface for debugging purposes but is not needed to run the application. Beken Corporation provides a development kit that customers can use to configure their applications. The development kit includes a software configuration tool and reference software code for stereo- mode Bluetooth speakers and hands-free operation. The interested reader is encouraged to contact their local Beken Corporation representative for more information. 3.9. Crystal Oscillator BK3266 contains an integrated crystal oscillator driver circuit to drive an external 26 MHz crystal. The 26 MHz crystal frequency provides the reference frequency to the frequency synthesizer and can also be selected as the reference clock to the internal MCU. If an external reference clock is used, the clock input should be applied to the XI pin. Care must be taken to not overdrive the XI input with a voltage above 3.6 V. |
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