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Regarding PMF register write protection

Question asked by PRATIBHA SURABHI on May 22, 2020
Latest reply on May 24, 2020 by lama

Hi All,

I am referring the MC9S12ZVM-Family RM. Register Write Protection, note mentions -

Make sure to set the write protection bit WP in PMFCFG0 after configuring
and prior to enabling PWM outputs and fault inputs.


Query is whether this write protect [WP] feature is used to avoid writing on those registers by user or to avoid spurious writes[ not from user code].


My understanding is that once these write protect registers are initialised in the Init sequence, they are not written over again.


Thank you in advance.