54.4.10.1 Cipher Mode

When AES_EMR.PLIPD is cleared and AES_EMR.PLIPEN=1, the message written into AES_IDATARx is first encrypted with the AES module and the encrypted message is authenticated with the SHA module. Therefore, when AES_EMR.PLIPD is cleared, AES_ODATARx are selected and sent to SHA_IDATARx as soon as AES_ODATARx are read. A read access in AES corresponds to a write access to the corresponding SHA_IDATARx. The number of SHA_IDATARx is greater than the number of AES_ODATARx, but the SHA module embeds the decoding logic to automatically dispatch AES_ODATARx values into the corresponding SHA_IDATARx without software intervention.