FMKVALID=B_0x0, ENCDIS=B_0x0, MKVALID=B_0x0
MCE status register
| MKVALID | Master key valid 0 (B_0x0): A valid key has not been written in MCE_MKEYRx registers, or a valid unlocked master key has been erased by hardware (if bit was set before) 1 (B_0x1): A valid key has been written in MCE_MKEYRx registers (write R0 -> R1 -> R2 -> R3 or the reverse) |
| FMKVALID | Fast master key valid This bit is reserved when fast master key is not present in the MCE instance. See Section 35.3: MCE implementation for detail. 0 (B_0x0): A valid key has not been written in MCE_FMKEYRx registers, or a valid unlocked fast master key has been erased by hardware (if bit was set before) 1 (B_0x1): A valid key has been written in MCE_FMKEYRx registers (write R0 -> R1 -> R2 -> R3 or the reverse) |
| ENCDIS | encryption disabled This bit is set by hardware when the encryption feature is not functional. When ENCDIS is set application must reset MCE peripheral to be able to use the encryption feature again. 0 (B_0x0): When ENC bit and BREN are set in MCE_REGCRx all allowed write accesses in region x are encrypted, and all allowed read requests are decrypted. 1 (B_0x1): When ENC bit and BREN are set in any MCE_REGCRx all write accesses in region x are ignored, and all read requests return zero. All previously written key material are also erased. |