54.10.3 Brown-Out Detectors (BOD) Characteristics

Figure 54-2. BOD33 Hysteresis OFF

Figure 54-3. BOD33 Hysteresis ON

Table 54-19. BOD33 Characteristics on VDD and VBAT Monitoring in Normal Mode (During Power-up Phase and Active Mode)
DC CHARACTERISTICS			Standard Operating Conditions: VDDIO=VDDANA 1.71 V to 3.63V (unless otherwise stated) Operating temperature -40°C ≤ TA ≤ +85°C
Param. No.	Symbol	Characteristics	Min.⁽¹⁾	Typical	Max.⁽²⁾	Units	Conditions
REG1	VBOD33	VDDANA and VBAT BOD levels	1.463	—	1.555	V	ActiveLEVEL[7:0] = 0x00 (Min Value) , HYST[3:0] =0x02
			1.609	—	1.707	V	ActiveLEVEL[7:0] = 0x19 (Recommended Value) , HYST[3:0] =0x02
			1.627	—	1.725	V	ActiveLEVEL[7:0] = 0x1C (Fuse Value) , HYST[3:0] = 0x02
			2.946	—	3.116	V	ActiveLEVEL[7:0] = 0xFF⁽³⁾ (Max Value) , HYST[3:0] = 0x00
REG3	VBOD33_{LEVEL_STEP}	VBOD33 step size, LEVEL[7:0]	—	6	—	mV
REG4	VBOD33_{HYST_STEP}	VBOD33 Hysteresis step size, HYST[3:0]	—	6	—	mV
REG5	TSTART⁽⁴⁾	Startup time (Time from enable to RDY)	—	27	—	µs

Note:

BOD- = VBOD(min) = (1.5 + (LEVEL[7:0] * VBOD33_{LEVEL_STEP})).
BOD+ = VBOD(max) = (VBOD(min) + (HYST[3:0] * VBOD33_{HYST_STEP})).
If a hysteresis value is programmed, the following equation must be respected to avoid any overflow on VBOD33(max): LEVEL[7:0] value < 255 - HYST[3:0] value.
These are based on design simulation. They are not covered by production test limits or characterization.

Table 54-20. BOD33 Characteristics on VDD and VBAT Monitoring in Low-Power Mode (During Standby/Backup/Hibernate Modes)
DC CHARACTERISTICS			Standard Operating Conditions: VDDIO=VDDANA 1.71 V to 3.63V (unless otherwise stated) Operating temperature -40°C ≤ TA ≤ +85°C
Param. No.	Symbol	Characteristics	Min.⁽¹⁾	Typical	Max.⁽²⁾	Units	Conditions
REG7	VBOD33	VDDANA and VBAT BOD levels	1.413	—	1.611	V	ActiveLEVEL[7:0] = 0x00 (Min Value) , HYST[3:0] =0x02
			1.551	—	1.773	V	ActiveLEVEL[7:0] = 0x19 (Recommended Value) , HYST[3:0] =0x02
			1.569	—	1.791	V	ActiveLEVEL[7:0] = 0x1C (Fuse Value) , HYST[3:0] =0x02
			2.845	—	3.23	V	ActiveLEVEL[7:0] = 0xFF⁽³⁾ (Max Value) , HYST[3:0] =0x00
REG9	VBOD33_{LEVEL_STEP}	VBOD33 step size, LEVEL[7:0]	—	6	—	mV
REG10	VBOD33_{HYST_STEP}	VBOD33 Hysteresis step size, HYST[3:0]	—	6	—	mV
REG11	TSTART⁽⁴⁾	Startup time (Time from enable to RDY)	—	27	—	µs

Note:

BOD- = VBOD(min) = (1.5 + (LEVEL[7:0] * VBOD33_{LEVEL_STEP})).
BOD+ = VBOD(max) = (VBOD(min) + (HYST[3:0] * VBOD33_{HYST_STEP})).
If a hysteresis value is programmed, the following equation must be respected to avoid any overflow on VBOD33(max) : LEVEL[7:0] value < 255 - HYST[3:0] value.
These are based on design simulation. They are not covered by production test limits or characterization.

Table 54-21. BOD33 Power Consumption
Symbol	CPU Mode	Conditions	T_A	Typ.	Max	Units
I_DD	Active / Idle	V_DD = 1.8V	Max 85°C Typ 25°C	8.52	12.07	µA
	Active / Idle	V_DD = 3.3V		10.10	14.28
	Standby with BOD continuous normal mode	V_DD = 1.8V		4.71	6.34
	Standby with BOD continuous normal mode	V_DD = 3.3V		6.01	8.06
	Standby with BOD continuous low power mode or Hibernate mode	V_DD= 1.8V		0.15	0.22
		V_DD = 3.3V		0.21	0.30

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