AES_CR register
| EN | EN: AES IP enable |
| DATATYPE | DATATYPE[1:0]: Data type selection |
| MODE | MODE[1:0]: AES operating mode |
| CHMOD_1_0 | CHMOD[1:0]: AES Chaining Mode selection |
| CCFC | CCFC: Computation Complete Flag Clear |
| ERRC | ERRC: Error clear |
| CCFIE | CCFIE: CCF Flag Interrupt Enable |
| ERRIE | ERRIE: Error Interrupt Enable |
| DMAINEN | DMAINEN: DMA Input Enable |
| DMAOUTEN | DMAOUTEN: DMA Output Enable |
| GCMPH | GCMPH[1:0]: GCM or CCM Phase selection |
| CHMOD_2 | CHMOD[2]: Chaining mode selection, bit [2] |
| KEYSIZE | KEYSIZE: Key Size selection. |
| NPBLB | NPBLB: Number of Padding Bytes in Last Block of payload. |