How to configure unused LF pins?

Discussion in 'General Electronics Chat' started by sunrome, Jul 21, 2015.

  1. sunrome

    Thread Starter New Member

    Jul 21, 2015
    I designed TPMS sensor on freescale FXTH87 and I don't want to use LF receiver, so I have to configure LF pins to avoid a floating input. What I have to do? leave pin not connected or connect to Vss, or something else?

    from datasheet:
    Each LF[A:B] pin will always have an impedance of approximately 500 kOhm to VSS due to the LFR input circuitry. The LFA/LFB
    pins are used by the LFR when the LFEN control bit is set and are not functional when the LFEN control bit is clear.

    Really appreciate your help.