SLVA528D September 2012 – August 2021 TPS65381-Q1 , TPS65381A-Q1
This function offers a mechanism to help protect safety SPI-mapped registers by means of SPI write-access protection and CRC check.
The register access protection includes two distinctive features:
The CRC controller is a diagnostic module, which performs the CRC to verify the integrity of the SPI-mapped register space. A signature representing the content of the safety registers is obtained when the content is read into the CRC controller. The responsibility of the CRC controller is to calculate the signature for a set of data and then compare the calculated signature value against a predetermined good-signature value stored in the SAFETY_CFG_CRC register by the MCU.
For complete details on the Device Configuration Register Protection operation, refer to the device data sheet.