65.6.1 SECUMOD Control Register
| Name: | SECUMOD_CR |
| Offset: | 0x0000 |
| Reset: | – |
| Property: | Write-only |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| KEY[15:8] | |||||||||
| Access | W | W | W | W | W | W | W | W | |
| Reset | – | – | – | – | – | – | – | – | |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| KEY[7:0] | |||||||||
| Access | W | W | W | W | W | W | W | W | |
| Reset | – | – | – | – | – | – | – | – | |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| SCRAMB[1:0] | |||||||||
| Access | W | W | |||||||
| Reset | – | – | |||||||
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| SWPROT | NORMAL | BACKUP | |||||||
| Access | W | W | W | ||||||
| Reset | – | – | – |
Bits 31:16 – KEY[15:0] Password
This command field acts on a toggle basis: writing the value 0x89CA alternatively makes the Normal or Backup Protection Registers appear and disappear.
Writing any other value in this field has no effect.
Bits 10:9 – SCRAMB[1:0] Memory Scrambling Enable
| Value | Description |
|---|---|
| 0 |
No effect. |
| 1 |
Memories are scrambled (default). |
| 2 | Memories are not scrambled. |
| 3 | No effect. |
Bit 2 – SWPROT Software Protection
| Value | Description |
|---|---|
| 0 | No effect. |
| 1 | Starts the BUSRAM4KB and BUREG256b Clear content. |
Bit 1 – NORMAL Normal Mode
| Value | Description |
|---|---|
| 0 | No effect. |
| 1 | Switches to Normal mode. |
Bit 0 – BACKUP Backup Mode
| Value | Description |
|---|---|
| 0 | No effect. |
| 1 | Switches to Backup mode. |