Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO Data Sheet

SAM4E [DATASHEET]

Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14

634

When an unspecified register access occurs, the URAD flag in the AES_ISR is raised. Its source is then reported
in the Unspecified Register Access Type (URAT) field. 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

The URAD bit and the URAT field can only be reset by the SWRST bit in the AES_CR.