Changes

== Endianness and word order ==

== Endianness and word order ==

When writing to the AES_CTR, AES_MAC or AES_KEY0/1/2/3 register, the hardware will process the written data according to the current input endianness specified in AES_CNT. This means that the byte ordering within each word is endian swapped accordingly but the word ordering of the register remains little endian.

 

 

Swaps the bytes of 32-bit writes to AES_CTR, AES_WRFIFO, AES_KEY*FIFO according to specified endianness. AES_MAC?

 

 

 

 

If reversed, writes to AES_KEY*FIFO and AES_WRFIFO fill the FIFO backwards. For AES_WRFIFO, this means that every 16-byte block will have its words in the reverse order, but the order of these blocks remains the same. AES_CNT is unaffected by this field. AES_MAC?

 

=== AES_CNT.output_word_order ===

 

If reversed, reads from AES_RDFIFO will drain the FIFO backwards. This means that every 16-byte output block will have its words in the reverse order, but the order of these blocks remains the same.

== CCM mode pitfall ==

== CCM mode pitfall ==