control register
| ALGODIR | Algorithm direction |
| ALGOMODE0 | Algorithm mode |
| DATATYPE | Data type selection |
| KEYSIZE | Key size selection (AES mode only) |
| FFLUSH | FIFO flush |
| CRYPEN | Cryptographic processor enable |
| GCM_CCMPH | GCM_CCMPH |
| ALGOMODE3 | ALGOMODE |