AnsweredAssumed Answered

EEPROM Write Problem at Power-down

Question asked by Sam Zeng on Jan 23, 2018
Latest reply on Feb 1, 2018 by Sam Zeng


I am using the STEVAL-IHM041V1 demo board to develop my own application. The mcu
is STM8S103F3P6. I checked the EEPROM locations to verify that the EEPROM read/write
are fine when the +5V is stable. But I have problem trying to save the last data
settings to EEPROM after the power has been removed. The EEPROM write is happening
before the +5V drops below 3V(BOR voltage). But it didn't work and I didn't get the
last saved data from EEPROM read once the board is powered up again. Why? Does anyone
experience similar problem?