15.6.6 VDD Brown-Out Detector Control

After a Reset, the bit field values of this register are determined by the corresponding BOOTCFG fuse which is BOD Configuration Fuse (BODCFG) . Refer to the BOOTCFG - Boot Configuration for details.

Fuses section for details

Name:	BODVDD
Offset:	0x1C
Reset:	0x00000000
Property:	Local Write-Protection


Bit	31	30	29	28	27	26	25	24
	WRTLOCK				VLMCFG[1:0]		VLMLVL[1:0]
Access	R/W				R/W	R/W	R/W	R/W
Reset	0				0	0	0	0


Bit	23	22	21	20	19	18	17	16
							LEVEL[1:0]
Access							R/W	R/W
Reset							0	0


Bit	15	14	13	12	11	10	9	8
				SAMPFREQ				ACTCFG
Access				R/W				R/W
Reset				0				0


Bit	7	6	5	4	3	2	1	0
		RUNSTDBY	STDBYCFG				ENABLE
Access		R/W	R/W				R/W
Reset		0	0				0

Bit 31 – WRTLOCK Write Lock

This bit locks the BODVDD register for future writes, effectively freezing the BODVDD configuration.

Any write to this BODVDD register will be discarded and return a bus error if WRTLOCK = ‘1’. The Reset value is loaded from the WRTLOCK bit in BOOTCFG.BODCFG.

Value	Description
0x0	The BODVDD configuration is not locked
0x1	The BODVDD configuration is locked

Bits 27:26 – VLMCFG[1:0] Voltage Level Monitor Interrupt Configuration

This bit field selects which incident will trigger a VLM interrupt. The Reset value is loaded from the VLMCFG bit in BOOTCFG.BODCFG.

Value	Name	Description
0x0	FALLING	VDD falls below the VLM threshold
0x1	RISING	VDD rises above the VLM threshold
0x2	BOTH	VDD crosses the VLM threshold

Bits 25:24 – VLMLVL[1:0] Voltage Level Monitor Level

The Reset value is loaded from the VLMLVL bit in BOOTCFG.BODCFG.

Value	Name	Description
0x0	OFF	VLM is disabled
0x1	5ABOVE	The VLM threshold is 5% above the BOD threshold
0x2	15ABOVE	The VLM threshold is 15% above the BOD threshold
0x3	25ABOVE	The VLM threshold is 25% above the BOD threshold

Bits 17:16 – LEVEL[1:0] BOD Level

This bit field controls the BOD threshold level. The Reset value is loaded from the LEVEL bits in BOOTCFG.BODCFG.

Note:

The given values are typical values. For further details, refer to the Electrical Characteristics section
The BOD Level must only be changed or written when the BOD is disabled
To change the BOD level when the BOD is enabled: first, write a '0' to the ENABLE bit without updating the BOD level. Then, perform another write with LEVEL set to the desired value and ENABLE=1

Value	Name	Description
0x0	BODLEVEL0	1.90V
0x1	BODLEVEL1	2.45V
0x2	BODLEVEL2	2.70V
0x3	BODLEVEL3	2.85V

Bit 12 – SAMPFREQ Sampling Frequency

This bit selects the BOD sample frequency. The Reset value is loaded from the SAMPFREQ bit in BOOTCFG.BODCFG.

Value	Name	Description
0	128HZ	The sample frequency is 128 Hz
1	32HZ	The sample frequency is 32 Hz

Bit 8 – ACTCFG BOD Configuration in Active Mode

The Reset value is loaded from the ACTCFG bit in BOOTCFG.BODCFG.

Value	Name	Description
0	ENABLE	In active mode, the BOD operates in continuous mode
1	SAMPLE	In active mode, the BOD operates in sampling mode

Bit 6 – RUNSTDBY Run in Standby

The Reset value is loaded from the RUNSTDBY bit in BOOTCFG.BODCFG.

Value	Description
0x0	The BOD is not running in Standby sleep mode
0x1	The BOD is running in Standby sleep mode if enabled by the ENABLE bit

Bit 5 – STDBYCFG BOD Configuration in Standby Sleep Mode

If the RUNSTDBY bit is set to '1', the STDBYCFG bit determines the BOD configuration in Standby sleep mode.

The Reset value is loaded from the STDBYCFG bit in BOOTCFG.BODCFG.

Value	Description
0x0	In Standby sleep mode, the BOD is configured in Continuous mode
0x1	In Standby sleep mode, the BOD is configured in Sampling mode

Bit 1 – ENABLE Enable

The Reset value is loaded from the ENABLE bit in BOOTCFG.BODCFG.

Value	Name	Description
0	DISABLE	BOD is disabled
1	ENABLE	BOD is enabled