AES Control Register
| DECRYPT_EN | Decryption Enabled When set, this bit causes host read accesses to use the decryption logic rather than go directly to the OSPI module. Note that the OSPI module must be programmed to work in XIP mode prior to setting this bit. |
| RESET_LOGIC | Reset the AES engine. |
| XIP_EN | When this bit is set, the OSPI can be used in XIP mode directly, with or without intervention from the decryption logic. |
| LD_KEY | Write 1 once the new key has been written by the Secure Enclave, so the key can be pre-processed by the AES engine. Read returns 0x0. |