Supply Controller Mode Register
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| KEY[7:0] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| OSCBYPASS | BKUPRETON | ||||||||
| Access | R/W | R/W | |||||||
| Reset | 0 | 0 |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| ONREG | BODDIS | BODRSTEN | |||||||
| Access | R/W | R/W | R/W | ||||||
| Reset | 1 | 0 | 1 |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| Access | |||||||||
| Reset |
Brownout Detector Reset Enable
| Value | Description |
|---|---|
| 0 |
(NOT_ENABLE): The core reset signal vddcore_nreset is not affected when a brownout detection occurs. |
| 1 |
(ENABLE): The core reset signal, vddcore_nreset is asserted when a brownout detection occurs. |
Brownout Detector Disable
| Value | Description |
|---|---|
| 0 |
(ENABLE): The core brownout detector is enabled. |
| 1 |
(DISABLE): The core brownout detector is disabled. |
Voltage Regulator Enable
| Value | Description |
|---|---|
| 0 |
(ONREG_UNUSED): Internal voltage regulator is not used (external power supply is used). |
| 1 |
(ONREG_USED): Internal voltage regulator is used. |
SRAM On In Backup Mode
| Value | Description |
|---|---|
| 0 | SRAM (Backup) switched off in Backup mode. |
| 1 | SRAM (Backup) switched on in Backup mode. Note: This bit is located in the VDDIO domain. |
Oscillator Bypass
| Value | Description |
|---|---|
| 0 |
(NO_EFFECT): No effect. Clock selection depends on the value of SUPC_CR.XTALSEL. |
| 1 |
(BYPASS): The 32.768 kHz crystal oscillator is bypassed if SUPC_CR.XTALSEL is set. OSCBYPASS must be set prior to setting XTALSEL. |
Password Key
| Value | Name | Description |
|---|---|---|
| 0xA5 | PASSWD | Writing any other value in this field aborts the write operation. |