Atmel Xplained Pro Evaluation Kit for the ATSAMD21J18A Microcontroller ATSAMD21-XPRO ATSAMD21-XPRO Data Sheet
Product codes
ATSAMD21-XPRO
955
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181C–SAM-D21_Datasheet–07/2014
36.11.4 32.768kHz Internal oscillator (OSC32K) Characteristics
Table 36-42. 32kHz RC Oscillator Characteristics
36.11.5 Ultra Low Power Internal 32kHz RC Oscillator (OSCULP32K) Characteristics
Notes: 1. These values are based on simulation. These values are not covered by test limits in production or
characterization.
2. This oscillator is always on.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Units
f
OUT
Output frequency
Calibrated against a 32.768kHz
reference at 25°C, over [-40, +85]C,
over [1.62, 3.63]V
reference at 25°C, over [-40, +85]C,
over [1.62, 3.63]V
28.508
32.768
34.734
kHz
Calibrated against a 32.768kHz
reference at 25°C, at V
reference at 25°C, at V
DD
=3.3V
32.276
32.768
33.260
Calibrated against a 32.768kHz
reference at 25°C, over [1.62, 3.63]V
reference at 25°C, over [1.62, 3.63]V
31.457
32.768
34.079
I
OSC32K
Current consumption
I
-
0.67
1.31
µA
t
STARTUP
Startup time
I
-
1
2
cycle
Duty
Duty Cycle
I
-
50
-
%
Table 36-43. Ultra Low Power Internal 32kHz RC Oscillator Characteristics
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Units
f
OUT
Output frequency
Calibrated against a 32.768kHz
reference at 25°C, over [-40, +85]C,
over [1.62, 3.63]V
reference at 25°C, over [-40, +85]C,
over [1.62, 3.63]V
25.559
32.768
38.011
kHz
Calibrated against a 32.768kHz
reference at 25°C, at V
reference at 25°C, at V
DD
=3.3V
31.293
32.768
34.570
Calibrated against a 32.768kHz
reference at 25°C, over
[1.62, 3.63]V
reference at 25°C, over
[1.62, 3.63]V
31.293
32.768
34.570
i
OSCULP32K
(1)(2)
-
-
125
nA
t
STARTUP
Startup time
I
-
10
-
cycles
Duty
Duty Cycle
I
-
50
-
%