58.4.7.1 Unspecified Register Access Detection

When an unspecified register access occurs, AESB_ISR.URAD rises. Its source is then reported in AESB_ISR.URAT. Only the last unspecified register access is available through the URAT field.

Several kinds of unspecified register accesses can occur:

  • Input Data register written during the data processing when SMOD = IDATAR0_START
  • Output Data register read during data processing
  • Mode register written during data processing
  • Output Data register read during sub-keys generation
  • Mode register written during sub-keys generation
  • Write-only register read access

URAD and URAT can only be reset by AESB_CR.SWRST.