JAJSQK1 july 2023 AFE539F1-Q1
PRODUCTION DATA
The AFE539F1-Q1 implements a cyclic redundancy check (CRC) feature for the NVM to make sure that the data stored in the NVM is uncorrupted. There are two types of CRC alarm bits implemented in the AFE539F1-Q1:
The NVM-CRC-FAIL-USER bit indicates the status of user-programmable NVM bits, and the NVM-CRC-FAIL-INT bit indicates the status of internal NVM bits. The CRC feature is implemented by storing a 16-bit CRC (CRC-16-CCITT) along with the NVM data each time the NVM program operation (write or reload) is performed and during the device boot up. The device reads the NVM data and validates the data with the stored CRC. The CRC alarm bits (NVM-CRC-FAIL-USER and NVM-CRC-FAIL-INT in the GENERAL-STATUS register) report any errors after the data are read from the device NVM. The alarm bits are set only at boot up.