54.5.11 SHA Write Protection Mode Register
| Name: | SHA_WPMR |
| Offset: | 0xE4 |
| Reset: | 0x00000000 |
| Property: | Read/Write |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| WPKEY[23:16] | |||||||||
| Access | W | W | W | W | W | W | W | W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| WPKEY[15:8] | |||||||||
| Access | W | W | W | W | W | W | W | W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| WPKEY[7:0] | |||||||||
| Access | W | W | W | W | W | W | W | W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| ACTION[1:0] | FIRSTE | WPCREN | WPITEN | WPEN | |||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | |||
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | |||
Bits 31:8 – WPKEY[23:0] Write Protection Key
| Value | Name | Description |
|---|---|---|
| 0x534841 | PASSWD | Writing any
other value in this field aborts the write operation of the WPEN,WPITEN,WPCREN
bits. Always reads as 0. |
Bits 6:5 – ACTION[1:0] Action on Abnormal Event Detection
| Value | Name | Description |
|---|---|---|
| 0 | REPORT_ONLY | No action (stop or clear key) is performed when one of WPVS,CGD,SEQE, or SWE flag is set. |
| 1 | LOCK_WPVS_SWE | If a processing is in progress when the SHA_WPSR.WPVS/SWE event detection occurs, the current processing is ended normally but no other processing is started while a SHA_CR.UNLOCK command is issued. |
| 2 | LOCK_CGD_SEQE | If a processing is in progress when the SHA_WPSR.CGD/SEQE event detection occurs, the current processing is ended normally but no other processing is started while a SHA_CR.UNLOCK command is issued. |
| 3 | LOCK_ANY_EV | If a processing is in progress when the SHA_WPSR.WPVS/CGD/SEQE/SWE events detection occurs, the current processing is ended normally but no other processing is started while a SHA_CR.UNLOCK command is issued. |
Bit 4 – FIRSTE First Error Report Enable
| Value | Description |
|---|---|
| 0 | The last write protection violation source is reported in SHA_WPSR.WPVSRC and the last software control error type is reported in SHA_WPSR.SWETYP. The SHA_ISR.SECE flag is set at the first error occurrence within a series. |
| 1 | Only the first write protection violation source is reported in SHA_WPSR.WPVSRC and only the first software control error type is reported in SHA_WPSR.SWETYP. The SHA_ISR.SECE flag is set at the first error occurrence within a series. |
Bit 2 – WPCREN Write Protection Control Enable
| Value | Description |
|---|---|
| 0 | Disables the write protection on control register if WPKEY corresponds to 0x534841 (“SHA” in ASCII). |
| 1 | Enables the write protection on control register if WPKEY corresponds to 0x534841 (“SHA” in ASCII). |
Bit 1 – WPITEN Write Protection Interruption Enable
| Value | Description |
|---|---|
| 0 | Disables the write protection on interrupt registers if WPKEY corresponds to 0x534841 (“SHA” in ASCII). |
| 1 | Enables the write protection on interrupt registers if WPKEY corresponds to 0x534841 (“SHA” in ASCII). |
Bit 0 – WPEN Write Protection Configuration Enable
See Register Write Protection for the list of registers that can be write-protected.
| Value | Description |
|---|---|
| 0 | Disables the write protection on configuration registers if WPKEY corresponds to 0x534841 (“SHA” in ASCII). |
| 1 | Enables the write protection on configuration registers if WPKEY corresponds to 0x534841 (“SHA” in ASCII). |