17.6.5 VDD Brown-Out Detector (BODVDD) Control
| Name: | BODVDD |
| Offset: | 0x10 |
| Reset: | X determined from NVM User Row |
| Property: | Write-Synchronized Bits, Enable-Protected Bits, PAC Write-Protection |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| Access | |||||||||
| Reset |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| LEVEL[5:0] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | |||
| Reset | x | x | x | x | x | x | |||
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| PSEL[3:0] | ACTCFG | ||||||||
| Access | R/W | R/W | R/W | R/W | R/W | ||||
| Reset | 0 | 0 | 0 | 0 | 0 | ||||
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| RUNSTDBY | STDBYCFG | ACTION[1:0] | HYST | ENABLE | |||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | |||
| Reset | 0 | 0 | x | x | x | x | |||
Bits 21:16 – LEVEL[5:0] BODVDD Threshold Level on VDD
These bits set the triggering voltage threshold for the BODVDD when the BODVDD monitors the VDD.
These bits are loaded from NVM User Row at start-up. The use of the HYST setting can help in eliminating restarts at startup when observed.
Bits 15:12 – PSEL[3:0] Prescaler Select
Selects the prescaler divide-by output for the BODVDD sampling mode. The input clock comes from the OSCULP32K 1.024 kHz output.
| Value | Name | Description |
|---|---|---|
| 0x0 | DIV2 | Divide clock by 2 |
| 0x1 | DIV4 | Divide clock by 4 |
| 0x2 | DIV8 | Divide clock by 8 |
| 0x3 | DIV16 | Divide clock by 16 |
| 0x4 | DIV32 | Divide clock by 32 |
| 0x5 | DIV64 | Divide clock by 64 |
| 0x6 | DIV128 | Divide clock by 128 |
| 0x7 | DIV256 | Divide clock by 256 |
| 0x8 | DIV512 | Divide clock by 512 |
| 0x9 | DIV1024 | Divide clock by 1024 |
| 0xA | DIV2048 | Divide clock by 2048 |
| 0xB | DIV4096 | Divide clock by 4096 |
| 0xC | DIV8192 | Divide clock by 8192 |
| 0xD | DIV16384 | Divide clock by 16384 |
| 0xE | DIV32768 | Divide clock by 32768 |
| 0xF | DIV65536 | Divide clock by 65536 |
Bit 8 – ACTCFG BODVDD Configuration in Active Mode
| Value | Description |
|---|---|
| 0 | In active mode, the BODVDD operates in continuous mode. |
| 1 | In active mode, the BODVDD operates in sampling mode. |
Bit 6 – RUNSTDBY Run in Standby
| Value | Description |
|---|---|
| 0 | In standby sleep mode, the BODVDD is disabled. |
| 1 | In standby sleep mode, the BODVDD is enabled. |
Bit 5 – STDBYCFG BODVDD Configuration in Standby Sleep Mode
If the RUNSTDBY bit is set to '1', the STDBYCFG bit sets the BODVDD configuration in standby sleep mode.
| Value | Description |
|---|---|
| 0 | In standby sleep mode, the BODVDD is configured in continuous mode. |
| 1 | In standby sleep mode, the BODVDD is configured in sampling mode. |
Bits 4:3 – ACTION[1:0] BODVDD Action
These bits are used to select the BODVDD action when the supply voltage crosses below the BODVDD threshold.
These bits are loaded from NVM User Row at start-up.
| Value | Name | Description |
|---|---|---|
| 0x0 | NONE | No action |
| 0x1 | RESET | The BODVDD generates a reset |
| 0x2 | INT | The BODVDD generates an interrupt |
| 0x3 | - | Reserved |
Bit 2 – HYST Hysteresis
This bit indicates whether hysteresis is enabled for the BODVDD threshold voltage.
This bit is loaded from NVM User Row at start-up.
| Value | Description |
|---|---|
| 0 | No hysteresis. |
| 1 | Hysteresis enabled. |
Bit 1 – ENABLE Enable
This bit is loaded from NVM User Row at start-up.
- This bit is write-synchronized: STATUS.BVDDSRDY must be checked to ensure the BODVDD.ENABLE synchronization is complete.
- This bit is not enable-protected.
| Value | Description |
|---|---|
| 0 | BODVDD is disabled. |
| 1 | BODVDD is enabled. |