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| ATXMEGA128B1_14 Datasheet, PDF (81/142 Pages) ATMEL Corporation – 8/16-bit Atmel XMEGA B1 Microcontroller | |||
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36.10 Brownout Detection Characteristics
Table 36-15. Brownout Detection Characteristics(1).
Symbol Parameter
BOD level 0 falling Vcc
BOD level 1 falling Vcc
BOD level 2 falling Vcc
BOD level 3 falling Vcc
BOD level 4 falling Vcc
BOD level 5 falling Vcc
BOD level 6 falling Vcc
BOD level 7 falling Vcc
tBOD Detection time
VHYST Hysteresis
Condition
T = 85ï°C, calibrated
Continuous mode
Sampled mode
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.
Symbol Parameter
tEXT
Minimum reset pulse width
VRST
Reset threshold voltage
Condition
VCC = 2.7 - 3.6V
VCC = 1.6 - 2.7V
Min
Typ
Max Units
1.5
1.6
1.72
1.8
2.0
2.2
V
2.4
2.6
2.8
3.0
0.4
µs
1000
1.6
%
Min
Typ
Max
Units
90
1000
ns
0.50*VCC
V
0.40*VCC
36.12 Power-on Reset Characteristics
Table 36-17. Power-on reset characteristics.
Symbol Parameter
Condition
VPOT-(1)
VPOT+
POR threshold voltage falling VCC
POR threshold voltage rising VCC
VCC falls faster than 1V/ms
VCC falls at 1V/ms or slower
Min
Typ
0.4
1.0
0.8
1.3
1.3
Note:
1. Both VPOT- values are only valid when BOD is disabled. When BOD is enabled the µBOD is enabled, and VPOT- =VPOT+
Max Units
V
1.59
V
XMEGA B1 [DATASHEET] 81
Atmel-8330F-AVR-ATxmega64B1-128B1_datasheetâ02/2014
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