pub type MODE_W<'a, const O: u8> = FieldWriterSafe<'a, u32, CR_SPEC, u8, MODE_A, 2, O>;
Field MODE writer - AES operating mode
MODE
Mode 1: encryption
Mode 2: key derivation (or key preparation for ECB/CBC decryption)
Mode 3: decryption
Mode 4: key derivation & decrypt (UNDOCUMENTED in ref. manual, exists in CubeMX code)