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ISM330BX 데이터시트(PDF) 31 Page - STMicroelectronics |
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ISM330BX 데이터시트(HTML) 31 Page - STMicroelectronics |
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31 / 150 page ![]() 5.3 TDM interface Time-division multiplexing (TDM) is a method of putting multiple data streams in one data signal by separating the signal into many frames. There are many ways to accomplish this. 5.3.1 Frame synchronization (WCLK) The function of the WCLK is simply to identify the beginning of a frame. In particular the frame starts at the rising edge of WCLK and the WCLK widths supported are: • 50% duty cycle • One slot width (16 BCLK) • One BCLK width In TDM mode, ISM330BX shall output accelerometer data on the TDMout pin at the following sampling rates: • WCLK = 8 kHz • WCLK = 16 kHz 5.3.2 Serial clock (BCLK) The sole purpose of the serial clock BCLK is to shift the data out of the serial TDMout port. To this purpose, the TDM interface uses an internal counter that is set to one when the rising edge of the WCLK is detected, and it is reset to zero when the maximum number of BCLK in a WCLK period is reached. ISM330BX Digital interfaces DS14588 - Rev 2 page 31/150 |
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