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BK3266SO16A Datasheet(PDF) 18 Page - Beken Corporation |
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BK3266SO16A Datasheet(HTML) 18 Page - Beken Corporation |
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18 / 28 page  Low Power Bluetooth Audio SoC v 0.5 © 2017 Beken Corporation Proprietary and Confidential Page 18 of 28 3.14. I2C and UART Interface There is an I2C interface or UART interface for debug or external MCU control of the BK3266. They both share the same pins GPIO0 and GPIO1. The I2C clock rate can be from 12 to 3072 divided frequency from 26 MHz clock. The UART clock rate can be from 3.2 kHz to 6.5 MHz. 3.15. SPI Interface The 4-wire SPI interface supports high speed data communication which can be used as an interface for an external memory or LCD controller. The SPI clock rate is from 50.8 kHz to 6.5 MHz when acts as master, and can be 6.5 MHz maximum as slave. 3.16. General Purpose SAR ADC The general purpose SAR ADC has 10-bit resolution with a programmable sampling rate range from 5 kHz up to 50 kHz and is used to measure DC and low frequency voltages. The input voltage range for the ADC is from 0V to 3V. The general purpose ADC has six channels as shown in Table 5. Channel Number Detected Voltage Description 0 VCCBAT Monitor battery voltage(0.65*VBAT) 1 GPIO2 GPIO2 voltage 2 GPIO3 GPIO3 voltage 3 VCC5USB Monitor USB voltage(0.5*VUSB) 4 GPIO11 GPIO11 voltage 5 Temp-Sensor Temp-Sensor Output voltage 6 GPIO13 GPIO13 voltage 7 GPIO14 GPIO14 voltage Table 5 ADC Channel Table 3.17. SDIO Card Interface and USB interface BK3266 includes a secure digital input output (SDIO) card interface. It supports either 1-bit mode, 2-bit mode or 4-bit mode. The initial clock rate is 203.125 kHz and can be up to 13 MHz. The USB interface support both host and device mode, with full speed. |
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