8.12.7.2 SECUMOD System Status Register
| Name: | SECUMOD_SYSR |
| Offset: | 0x0004 |
| Reset: | 0x000000D4 |
| Property: | Read/Write |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| Access | |||||||||
| Reset |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| Access | |||||||||
| Reset |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| NIMP_IDLE | |||||||||
| Access | R | ||||||||
| Reset | 0 |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| SCRAMB | AUTOBKP | NIMP_EN | SWKUP | BACKUP | ERASE_ON | ERASE_DONE | |||
| Access | R | R | R | R | R | R | R/W | ||
| Reset | 1 | 1 | 0 | 0 | 1 | 0 | 0 |
Bit 8 – NIMP_IDLE “CPU in Idle” Preliminary Condition for Non-Imprinting
| Value | Description |
|---|---|
| 0 | Idle is not part of the preliminary conditions list. |
| 1 | Idle is part of the preliminary conditions list. |
Bit 7 – SCRAMB Scrambling Enabled
| Value | Description |
|---|---|
| 0 | Disabled |
| 1 | Enabled |
Bit 6 – AUTOBKP Automatic Backup Mode Enabled
| Value | Description |
|---|---|
| 0 | Disabled |
| 1 | Enabled |
Bit 5 – NIMP_EN Non-Imprinting Enabled
| Value | Description |
|---|---|
| 0 | Disabled |
| 1 | Enabled |
Bit 3 – SWKUP SWKUP State
| Value | Description |
|---|---|
| 0 | No SWKUP signal sent since the last clear. |
| 1 | SWKUP signal has been sent since the last clear. |
Bit 2 – BACKUP Backup Mode
| Value | Description |
|---|---|
| 0 | Normal mode is active. |
| 1 | Backup mode is active. |
Bit 1 – ERASE_ON Erase Process Ongoing
When ERASE_ON returns to 0, ERASE_DONE is set after half a period of ICLK.
| ERASE_ON | ERASE_DONE | Status | Action |
|---|---|---|---|
| 0 | 0 | No Erase ongoing or since the last Erase. | – |
| 1 | 0 | An Erase process is running. | Wait until the ERASE_ON flag is reset. ERASE_DONE will rise, see row below. |
| 0 | 1 | An Erase occurred and is finished. | Clear the ERASE_DONE flag. |
| 1 | 1 | An Erase process is running. The ERASE_DONE flag refers to a previous Erase process, but was not cleared. | Wait until the ERASE_ON flag is reset, then clear the ERASE_DONE flag. |
| Value | Description |
|---|---|
| 0 | The Erase automaton is not running. |
| 1 | The Erase automaton is currently running; memories are not accessible. |
Bit 0 – ERASE_DONE Erasable Memories State
| Value | Description |
|---|---|
| 0 | Content of the secure memories has not been erased since the last clear. |
| 1 | Content of
the secure memories has been erased since the last clear. Write a '1' to this bit
to clear this flag. The flag also activates the SECURAM interrupt line as long as
it is not cleared. Note: Not
clearing this flag does not prevent the next erase processes.
|