ATXMEGA128A4_09 Datasheet, PDF (68/104 Pages) ATMEL Corporation – 8/16-bit XMEGA A4 Microcontroller

34.11 POR Characteristics
Table 34-11. Power-on Reset Characteristics
Symbol Parameter
V_POT-
V_POT+
POR threshold voltage falling Vcc
POR threshold voltage rising Vcc
Condition
34.12 Reset Characteristics
Table 34-12. Reset Characteristics
Symbol Parameter
Minimum reset pulse width
Reset threshold voltage
Condition
V_CC = 2.7 - 3.6V
V_CC = 1.6 - 2.7V
34.13 Oscillator Characteristics
Table 34-13. Internal 32.768 kHz Oscillator Characteristics
Symbol Parameter
Condition
Accuracy
T = 85°C, V_CC = 3V,
After production calibration
Table 34-14. Internal 2 MHz Oscillator Characteristics
Symbol Parameter
Condition
Accuracy
T = 85°C, V_CC = 3V,
After production calibration
DFLL Calibration step size
T = 25°C, V_CC = 3V
Table 34-15. Internal 32 MHz Oscillator Characteristics
Symbol Parameter
Condition
Accuracy
T = 85°C, V_CC = 3V,
After production calibration
DFLL Calibration stepsize
T = 25°C, V_CC = 3V
Table 34-16. Internal 32 kHz, ULP Oscillator Characteristics
Symbol Parameter
Condition
Output frequency 32 kHz ULP OSC T = 85°C, V_CC = 3.0V
XMEGA A4
Min
Typ
Max Units
1
V
1.3
Min
Typ
Max Units
90
ns
0.45*V_CC
V
0.42*V_CC
Min
Typ
Max Units
-0.5
0.5
%
Min
Typ
Max Units
-1.5
0.15
1.5
%
Min
Typ
Max Units
-1.5
0.2
1.5
%
Min
Typ
Max Units
26
kHz
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8069L–AVR–11/09