ST STM32L4 5 Series - Page 850

Advanced encryption standard hardware accelerator (AES) RM0351
850/1830 DocID024597 Rev 5
Note: The key registers from 4 to 7 are used only when 256-bit key length is selected. These
registers have no effect when 128-bit key length is selected (only key registers from 0 to 3
are used).
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
KEYR731:16]
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
KEYR7[15:0]
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
Bits 31:0 KEYR7[31:0]: Data output register (MSB key [255:224])
Same description as AES_KEYR0 for the key[255:224].