Data Sheet

975
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181G–SAM-D21_Datasheet–09/2015
36.11.4 32.768kHz Internal oscillator (OSC32K) Characteristics
Table 36-52. 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
28.508 32.768 34.734
kHzCalibrated against a 32.768kHz
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
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 36-53. 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
25.559 32.768 38.011
kHz
Calibrated against a 32.768kHz
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
31.293 32.768 34.570
I
OSCULP32K
(1)(2)
- - 125 nA
t
STARTUP
Startup time
I
- 10 - cycles
Duty Duty Cycle
I
- 50 - %