31.5.16 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: | 0x74 |
| Reset: | 0x0000FFFF |
| Property: | R/W |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| UBWPLOCK | |||||||||
| Access | R/S | ||||||||
| Reset | 0 |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| Access | |||||||||
| Reset |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| UBWP[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 | |
| UBWP[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 – UBWPLOCK Note: This field can only be modified when UBWPLOCK=0, BUSY=0 and KEY=<CFGKEY Value>.
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 | Name | Description |
|---|---|---|
| 1 | LOCKED | This register is Locked and cannot be modified |
| 0 | UNLOCKED | This register is NOT Locked and can be modified |
Bits 15:0 – UBWP[15:0] Note: This field can only be modified when UBWPLOCK=0, BUSY=0 and KEY=<CFGKEY Value>.
Note:
- This field can only be modified when UBWPLOCK = 0, STATUS.BUSY = 0 and KEY.KEY = <CFGKEY Value>.
| Value | Name | Description |
|---|---|---|
| 1 | ENABLE | Erase and Write Protection for this Upper Boot Page is Enabled |
| 0 | DISABLE | Erase and Write Protection for this Upper Boot Page is Disabled |