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Visitor II
October 12, 2018
Question

What are the units for the "output data rate of 5.3kHz? How long does the LIS2DE12 take to fill its FIFO.

  • October 12, 2018
  • 1 reply
  • 586 views

The datasheet gives an "output data rate" for this sensor of 5.3kHz. What are the units on this, bits, bytes, 16-bit per-axis words, or for each complete set of 3 X, Y & Z data samples? Is this the output of internal sampling, the fifo fill rate (units), or the I2/C SPI external interface. What I'm trying to understand is how long it takes to fill the FIFO, and when full how long does the controller have to fetch the data before an overflow occurs.

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    1 reply

    ST Employee
    October 24, 2018

    The FIFO has 32 sets of samples (X, Y, Z, 8 bit each).

    So it will take 32 * 1/5300 = 6.03ms to fill the FIFO at the 5.3kHz output data rate.