ATXMEGA128B1_14 Datasheet, PDF (83/142 Pages) ATMEL Corporation – 8/16-bit Atmel XMEGA B1 Microcontroller

36.14.2 Calibrated 2MHz RC Internal Oscillator characteristics
Table 36-21. Calibrated 2MHz internal oscillator characteristics.
Symbol Parameter
Frequency range
Factory calibrated frequency
Factory calibration accuracy
User calibration accuracy
DFLL calibration stepsize
Condition
Min
DFLL can tune to this frequency over
voltage and temperature
1.8
T = 85C, V_CC= 3.0V
-1.5
-0.2
Typ
2.0
0.22
Max Units
2.2
MHz
MHz
1.5
%
0.2
%
%
36.14.3 Calibrated and tunable 32MHz Internal Oscillator characteristics
Table 36-22. Calibrated 32MHz internal oscillator characteristics.
Symbol Parameter
Frequency range
Factory calibrated frequency
Factory calibration accuracy
User calibration accuracy
DFLL calibration step size
Condition
Min
DFLL can tune to this frequency over
voltage and temperature
30
T = 85C, V_CC= 3.0V
-1.5
-0.2
Typ
32
0.23
Max Units
35
MHz
MHz
1.5
%
0.2
%
%
36.14.4 32kHz Internal ULP Oscillator characteristics
Table 36-23. 32kHz internal ULP oscillator characteristics.
Symbol Parameter
Factory calibrated frequency
Factory calibration accuracy
Condition
T = 85C, V_CC= 3.0V
Min
Typ
Max Units
32
kHz
-12
12
%
36.14.5 Phase Locked Loop (PLL) characteristics
Table 36-24. Internal PLL characteristics.
Symbol Parameter
f_IN
Input Frequency
f_OUT
Output frequency⁽¹⁾
Start-up time
re-lock time
Condition
Min
Typ
Max Units
Output frequency must be within f_OUT
0.4
64
MHz
V_CC= 1.60V
V_CC= 2.70V
20
32
MHz
20
128
23
100
µs
20
50
µs
Note:
1. The maximum output frequency vs. supply voltage is linear between 1.8V and 2.7V, and can never be higher than 4 times the maximum CPU frequency.
XMEGA B1 [DATASHEET] 83
Atmel-8330F-AVR-ATxmega64B1-128B1_datasheet–02/2014