EEPROM erased

Started by p_anglum November 18, 2003
I have posted questions about the protection scheme of the EEPROM on
the MC9S12DP256B and have been enlightened about it.

Unfortunately we need to leave the EEPROM unprotected because the end
user will be doing some calibration updates which is written to the

This leads me to the reason for the question, which is EEPROM erasure
during/after powerup/powerdown.

We are not writing to the EEPROM at these times - in fact we only
write to it during a special calibration update routine.

Anyone have any experience with this?