Input to the block encrypt and output from the block encrypt are stored in the same data structure. ECBDATAPTR should point to this data structure before STARTECB is initiated.
| Property | Address offset | Description |
|---|---|---|
| KEY | 0 | 16 byte AES key |
| CLEARTEXT | 16 | 16 byte AES cleartext input block |
| CIPHERTEXT | 32 | 16 byte AES ciphertext output block |