Datasheet

91
XMEGA D4 [DATASHEET]
8135P–AVR–01/2014
32.2.8 Bandgap and Internal 1.0V Reference Characteristics
Table 32-41. Bandgap and Internal 1.0V reference characteristics.
32.2.9 Brownout Detection Characteristics
Table 32-42. 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.
32.2.10 External Reset Characteristics
Table 32-43. External reset characteristics.
Symbol Parameter Condition Min. Typ. Max. Units
Startup time
As reference for ADC 1 Clk
PER
+ 2.5µs
µs
As input voltage to ADC and AC 1.5
Bandgap voltage 1.1
V
INT1V Internal 1.00V reference T= 85°C, after calibration 0.98 1 1.02
Variation over voltage and temperature Calibrated at T= 85°C, V
CC
= 3.0V ±1.0 %
Symbol Parameter Condition Min. Typ. Max. Units
V
BOT
BOD level 0 falling V
CC
1.50 1.62 1.75
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 1.2 %
Symbol Parameter Condition Min. Typ. Max. Units
t
EXT
Minimum reset pulse width 1000 90 ns
V
RST
Reset threshold voltage (V
IH
)
V
CC
= 2.7 - 3.6V 0.6*V
CC
V
V
CC
= 1.6 - 2.7V 0.6*V
CC
Reset threshold voltage (V
IL
)
V
CC
= 2.7 - 3.6V 0.5*V
CC
V
CC
= 1.6 - 2.7V 0.4*V
CC
R
RST
Reset pin pull-up resistor 25 k