AES key register 0
| KEY | Cryptographic key, bits [31:0] This write-only bitfield contains the bits [31:0] of the AES encryption or decryption key, depending on the operating mode MODE[1:0] in AES_CR. The AES_KEYRx registers may be written only when KEYSIZE value is correct and when the AES peripheral is disabled (EN bit of the AES_CR register cleared). A special writing sequence is also required, as described in KEYVALID bit of the AES_SR register. Note that, if KMOD[1:0] is at 10 (shared key), the key is directly loaded from SAES peripheral to AES_KEYRx registers (hence writes to key register is ignored and KEIF is set). When KEYVALID is set a write to this register clears KEYVALID if AES is disabled. |