AN671 - ST Microelectronics

AN671 Prevention of Data Corruption in ST6 On-Chip EEPROM

APPLICATION NOTE Prevention of Data Corruption in ST6 On-Chip EEPROM C. PILON INTRODUCTION The ST6 Microcontroller has been designed to avoid any potential corruption of data programmed into its on-chip EEPROM (when available). Data integrity can be ensured as long as the application designer follows the guidelines provided in this note. In general, EEPROM .

Features

ARE SOLUTION This solution only applies to the power down sequence which represents the majority of data corruption risks. The solution consists in disabling the enable bit of the EEPROM control register after writing into the EEPROM and before switching ”off” the application; this avoids any spurious writing as described above. Note that this bit is automatically reset upon power on, thus the reason why most cases of data corruption can occur at power down, as the enable bit may have been modified by the user software. AN671 / 02,94 PREVENTION OF DATA CORRUPTION IN ST6 ON-CHIP EEPROM 2 HAR.