29.5.8 Tamper Erase

Tamper Erase ensures rapid overwrite on tamper of a Data FLASH row selected by SECCTRL.TEROW.

When a RTC tamper event occur while tamper erase is enabled (SECCTRL.TAMPEEN=1):

the Tamper Erase row in data space addressed by SECCTRL.TEROW is written to zero.

This is performed using a special overwrite mechanism in the NVM block that overwrites the complete row with zero. The RTC must be configured to generate the tamper erase event.

Note: Data Flash endurance is affected by the tamper erase feature. Refer to the NVM Block (Flash, Data Flash, NVM Configuration Rows) Electrical Specifications from Electrical Characteristics chapter.