BHKLOCK=B_0x0, CNT1SEC=B_0x0, TAMPSEC=B_0x0
TAMP secure configuration register
| BKPRWSEC | Backup registers read/write protection offset BKPRWSEC value must be from 0 to 32. Protection zone 1 is defined for backup registers from TAMP_BKP0R to TAMP_BKPxR (x = BKPRWSEC-1, with BKPRWSEC greater than or equal 1). if TZEN=1, these backup registers can be read and written only with secure access. If BKPRWSEC = 0: there is no protection zone 1. Refer to Figure871: Backup registers protection zones. Note: If TZEN=0: the protection zone 1 can be read and written with non-secure access. Note: If BKPRWPRIV is set, BKPRWSEC[7:0] can be written only in privileged mode. |
| CNT1SEC | Monotonic counter 1 secure protection 0 (B_0x0): Monotonic counter 1 (TAMP_COUNT1R) can be read and written when the APB access is secure or non-secure. 1 (B_0x1): Monotonic counter 1 (TAMP_COUNT1R) can be read and written only when the APB access is secure. |
| BKPWSEC | Backup registers write protection offset BKPWSEC value must be from 0 to 32. Protection zone 2 is defined for backup registers from TAMP_BKPyR (y = BKPRWSEC) to TAMP_BKPzR (z = BKPWSEC-1, with BKPWSECBKPRWSEC): if TZEN=1, these backup registers can be written only with secure access. They can be read with secure or non-secure access. If BKPWSEC = 0 or if BKPWSEC less than or equal BKPRWSEC: there is no protection zone 2. Protection zone 3 is defined for backup registers from TAMP_BKPtR (t = BKPWSEC if BKPWSEC greater than or equal BKPRWSEC, else t = BKPRWSEC). They can be read or written with secure or non-secure access. If BKPWSEC=32: there is no protection zone 3. Refer to Figure871: Backup registers protection zones. Note: If TZEN=0: the protection zone 2 can be read and written with non-secure access. Note: If BKPWPRIV is set, BKPRWSEC[7:0] can be written only in privileged mode. |
| BHKLOCK | Boot hardware key lock This bit can be read and can only be written to 1 by software. It is cleared by hardware together with the backup registers following a tamper detection event or when the readout protection (RDP) is disabled. 0 (B_0x0): The Backup registers from TAMP_BKP0R to TAMP_BKP7R can be accessed according to the Protection zone they belong to. 1 (B_0x1): The backup registers from TAMP_BKP0R to TAMP_BKP7R cannot be accessed neither in read nor in write (they are read as 0 and write ignore). |
| TAMPSEC | Tamper protection (excluding monotonic counters and backup registers) Note: Refer to Section75.3.5: TAMP secure protection modes for details on the read protection. 0 (B_0x0): Tamper configuration and interrupt can be written when the APB access is secure or non-secure. 1 (B_0x1): Tamper configuration and interrupt can be written only when the APB access is secure. |