BHKLOCK=B_0x0
TAMP configuration register
| BKPRW | Backup registers read/write protection offset BKPRW value must be from 0 to 32. Protection zone 1 is defined for backup registers from TAMP_BKP0R to TAMP_BKPxR (x = BKPRW-1, with BKPRW more or equal to 1). If BKPRW = 0: there is no protection zone 1. Refer to Figure 499: Backup registers protection zones. Note: If BKPRWPRIV is set, BKPRW[7:0] can be written only in privileged mode. |
| BKPW | Backup registers write protection offset BKPW value must be from 0 to 32. Protection zone 2 is defined for backup registers from TAMP_BKPyR (y = BKPRW) to TAMP_BKPzR (z = BKPW-1, with BKPW > BKPRW): If BKPWSEC = 0 or if BKPWSEC UNDER OR EQUAL BKPRWSEC: there is no protection zone 2. Protection zone 3 is defined for backup registers from TAMP_BKPtR (t = BKPW if BKPWSEC more or equal to BKPRWSEC, else t = BKPRWSEC). If BKPWSEC = 32: there is no protection zone 3. Refer to Figure 499: Backup registers protection zones. Note: If BKPWPRIV is set, BKPRW[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). |