Figure 229. 64-Bit Block Construction According To Datatype - STMicroelectronics STM32F405 Reference Manual

Cryptographic processor (CRYP)
cryptographic algorithm (for the AES, the block length is four 32-bit words, but swapping
only takes place at word level, so it is identical to the one described here for the TDES).
Note: The same swapping is performed between the IN FIFO and the CRYP data block, and
between the CRYP data block and the OUT FIFO.
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Figure 229. 64-bit block construction according to DATATYPE

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