16.21.9 NVMLBWP - Flash Boot (Page) Write Protect Register
| Name: | NVMLBWP |
| Offset: | 0xF0 |
| Reset: | 0x80FFFFFF |
| Property: | - |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| ULOCK | |||||||||
| Access | R/C | ||||||||
| Reset | 1 |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| LBWP[17:16] | |||||||||
| Access | R/W | R/W | |||||||
| Reset | 1 | 1 | |||||||
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| LBWP[15:8] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| LBWP[7:0] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |
Bit 31 – ULOCK Boot (Page) Write Protect (LBWPn) Unlock Bit
Note:
- This field can only be modified when the NVMKEY unlock sequence is satisfied.
- This field can be cleared at the same time as writing to LBWP[msb:lsb].
| Value | Description |
|---|---|
| 1 | LBWPn bits are not locked and can be modified |
| 0 | LBWPn bits are locked and cannot be modified |
Bits 17:0 – LBWP[17:0] Boot Pages Write Protect Bits
- Bit [15:0] – Provides erase and write protection for Boot Flash pages 0 to 15.
- Bit 16 – Provides erase and write protection for the Device/Boot Configuration page.
- Bit 17 – Indicates whether the
protection settings are One Time Programmable (OTP).Note: The OTP page is always erase protected and its associated LBWP bit is only for write protection.
Note:
- This field can only be modified when
the NVMKEY unlock sequence is satisfied and ULOCK =
1. - The OTP page is always erase protected, and its associated LBWP bit is only for write protection.
- These bits are only reset by a POR and are not affected by other Reset sources.
| Value | Description |
|---|---|
| 1 | Erase and write protection for lower boot page n is enabled |
| 0 | Erase and write protection for lower boot page n is disabled |