56.4.5.2 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.

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