58.4.5.1 If AESB_MR.LOD = 0

AESB_ISR.DATRDY is cleared when at least one of the Output Data registers is read (see the figure below).

Figure 58-1. Manual and Auto Modes with AESB_MR.LOD = 0

If the user does not want to read the output data registers between each encryption/decryption, AESB_ISR.DATRDY will not be cleared. If AESB_ISR.DATRDY is not cleared, the user cannot know the end of the following encryptions/decryptions.