SFFS138 Functional safety information

SFFS138 December 2021 TCAN1164-Q1

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5.3.4.1 SM-13: Internal memory CRC; CRC_EEPROM

The CRC_EEPROM interrupt is set when the internal EEPROM used for trimming has a CRC error. Upon power up the device loads an internal register from the EEPROM and performs a CRC check. If an error is present after eight attempts of loading valid data the CRC_EEPROM interrupt will be set. This will indicate an error that may impact device performance. This is repeated when the device leaves fail-safe mode due to a wake event. The device will perform a CRC check on the internal registers loaded from the EEPROM. If there is an error the device will reload the registers from the EEPROM. If there is a CRC error the device will attempt to load the internal registers up to eight times. After the eighth attempt the CRC_EEPROM interrupt flag will be set. This will indicate an error that may impact the device performance.