OPMOD=ECB, DUALBUFF=INACTIVE, CFBS=SIZE_128BIT, SMOD=MANUAL_START, KEYSIZE=AES128
Mode Register
| CIPHER | Processing Mode |
| GTAGEN | GCM Automatic Tag Generation Enable |
| DUALBUFF | Dual Input Buffer 0 (INACTIVE): AES_IDATARx cannot be written during processing of previous block. 1 (ACTIVE): AES_IDATARx can be written during processing of previous block when SMOD = 2. It speeds up the overall runtime of large files. |
| PROCDLY | Processing Delay |
| SMOD | Start Mode 0 (MANUAL_START): Manual Mode 1 (AUTO_START): Auto Mode 2 (IDATAR0_START): AES_IDATAR0 access only Auto Mode (DMA) |
| KEYSIZE | Key Size 0 (AES128): AES Key Size is 128 bits 1 (AES192): AES Key Size is 192 bits 2 (AES256): AES Key Size is 256 bits |
| OPMOD | Operating Mode 0 (ECB): ECB: Electronic Code Book mode 1 (CBC): CBC: Cipher Block Chaining mode 2 (OFB): OFB: Output Feedback mode 3 (CFB): CFB: Cipher Feedback mode 4 (CTR): CTR: Counter mode (16-bit internal counter) 5 (GCM): GCM: Galois/Counter mode |
| LOD | Last Output Data Mode |
| CFBS | Cipher Feedback Data Size 0 (SIZE_128BIT): 128-bit 1 (SIZE_64BIT): 64-bit 2 (SIZE_32BIT): 32-bit 3 (SIZE_16BIT): 16-bit 4 (SIZE_8BIT): 8-bit |
| CKEY | Countermeasure Key 14 (PASSWD): This field must be written with 0xE to allow CMTYPx bit configuration changes. Any other values will abort the write operation in CMTYPx bits.Always reads as 0. |