7.2.4.10.2 Decipher Mode

When AES_EMR.PLIPD is written to ‘1’ and AES_EMR.PLIPEN=1, the message written into AES_IDATARx is decrypted with the AES module and also sent to SHA for authentication. Therefore, when AES_EMR.PLIPD=1, AES_IDATARx are selected and sent to SHA_IDATARx as soon as AES_IDATARx are written. A write 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_IDATARx values into the corresponding SHA_IDATARx without software intervention.