31.2.23.14 Upper BFM Write Protect Register
| Symbol | Description | Symbol | Description | Symbol | Description |
|---|---|---|---|---|---|
| R | Readable bit | HC | Cleared by Hardware | (Grey cell) | Unimplemented |
| W | Writable bit | HS | Set by Hardware | X | Bit is unknown at Reset |
| K | Write to clear | S | Software settable bit | — | — |
| Name: | UBWP |
| Offset: | 0x0070 |
| Reset: | 0x0000FFFF |
| Property: | PAC Write Protection, KEY.KEY[7:0] = CFGKEY to unlock when unprotected |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| UBWPLOCK | |||||||||
| Access | R/W | ||||||||
| Reset | 0 |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| Access | |||||||||
| Reset |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| UBWP15 | UBWP14 | UBWP13 | UBWP12 | UBWP11 | UBWP10 | UBWP9 | UBWP8 | ||
| 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 | |
| UBWP7 | UBWP6 | UBWP5 | UBWP4 | UBWP3 | UBWP2 | UBWP1 | UBWP0 | ||
| 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 – UBWPLOCK UBWP Lock Bit
Note:
- This field can be set at the same time as writing to UBWP. Once set, UBWPLOCK can only be cleared by a reset (Writing zero has no effect.).
- This field can only be modified when UBWPLOCK=0, STATUS.BUSY=0 and KEY.KEY=<CFGKEY Value>.
| Value | Description |
|---|---|
| 1 | UBWP & UBWPLOCK fields are Locked and cannot be modified |
| 0 | UBWP & UBWPLOCK fields are NOT Locked and can be modified |
Bits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 – UBWP Upper Boot Pages Write Protect Bits
Note:
- This field can only be modified when UBWPLOCK=0, STATUS.BUSY=0 and KEY.KEY=<CFGKEY Value>.
| Value | Description |
|---|---|
| 1 | Erase and Write Protection for Upper Boot Page n is Enabled |
| 0 | Erase and Write Protection for Upper Boot Page n is Disabled |