61.4.5.1 Unspecified Register Access Detection
When an unspecified register access occurs, TDES_ISR.URAD is set. Its source is then reported in TDES_ISR.URAT. Only the last unspecified register access is available through TDES_ISR.URAT.
Several kinds of unspecified register accesses can occur:
- TDES_IDATARx written during the data processing in DMA mode
- TDES_ODATARx read during the data processing
- TDES_MR written during the data processing
- Write-only register read access
URAD and URAT can only be reset by TDES_CR.SWRST.