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MCF8316C-Q1: FG pin related issues

Part Number: MCF8316C-Q1


HI !

One : Is the feedback of FG pin a sine wave. 

Two: If so, do we need to obtain the sine wave frequency of the FG pin.

  • Hi 

    1) FG pin provides pulses which are proportional to motor speed not sine wave.

    Figure 7-46 of the datasheet shows the FG output when .

    2) The MCF8316C-Q1 provides information about the motor speed through the Frequency Generate (FG) pin. 

    If you use this function, we recommend that you use it correctly according to the Pin Functions and register configurations in the datasheet.
    If you do not use this function, we also recommend that you connect a pull-up resistor.