SAES 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 SAES_CR. The SAES_KEYRx registers may be written only when KEYSIZE value is correct and when the SAES peripheral is disabled (EN bit of the SAES_CR register cleared). A special writing sequence is also required, as described in KEYVALID bit of the SAES_SR register. Note that, if KEYSEL[2:0] is different from 0 and KEYVALID=0, the key is directly loaded to SAES_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 SAES is disabled. |