Datasheet

80
XMEGA B1 [DATASHEET]
Atmel-8330H-AVR-ATxmega64B1-128B1_datasheet–AVR–12/2014
36.10 Brownout Detection Characteristics
Table 36-15. Brownout Detection Characteristics
(1)
Note: 1. BOD is calibrated at 85°C within BOD level 0 values, and BOD level 0 is the default level.
36.11 External Reset Characteristics
Table 36-16. External Reset Characteristics
36.12 Power-on Reset Characteristics
Table 36-17. Power-on Reset Characteristics
Note: 1. Both V
POT-
values are only valid when BOD is disabled. When BOD is enabled the µBOD is enabled, and V
POT-
=V
POT+
.
Symbol Parameter Condition Min. Typ. Max. Units
BOD level 0 falling V
CC
T = 85C, calibrated 1.5 1.6 1.72
V
BOD level 1 falling V
CC
1.8
BOD level 2 falling V
CC
2.0
BOD level 3 falling V
CC
2.2
BOD level 4 falling V
CC
2.4
BOD level 5 falling V
CC
2.6
BOD level 6 falling V
CC
2.8
BOD level 7 falling V
CC
3.0
t
BOD
Detection time
Continuous mode 0.4
µs
Sampled mode 1000
V
HYST
Hysteresis 1.6 %
Symbol Parameter Condition Min. Typ. Max. Units
t
EXT
Minimum reset pulse width 90 1000 ns
V
RST
Reset threshold voltage
V
CC
= 2.7 - 3.6V 0.50*V
CC
V
V
CC
= 1.6 - 2.7V 0.40*V
CC
Symbol Parameter Condition Min. Typ. Max. Units
V
POT-
(1)
POR threshold voltage falling V
CC
V
CC
falls faster than 1V/ms 0.4 1.0
V
V
CC
falls at 1V/ms or slower 0.8 1.3
V
POT+
POR threshold voltage rising V
CC
1.3 1.59 V