Hi Shimizu-san,
The description in the register map is accurate. One is for diagnostic of EEPROM CRC only checks CRC with CRCCALC (EE_CRC_CHK) and one is for actual check of EEPROM CRC (uC_EE_Trim_Check).
Please refer to the detailed safety manual for more details on how to implement. If you need more details or descriptions from the documents not on the web feel free to reach out over email and we can answer there.
Regards,
Will Toth