Data Sheet

1094
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181G–SAM-D21_Datasheet–09/2015
Table A-43. DFLL48M Characteristics - Closed Loop Mode (Device Variant A)
Table A-44. DFLL48M Characteristics - Closed Loop Mode (Device Variant B)
A.8.4 32.768kHz Internal oscillator (OSC32K) Characteristics
Table A-45. 32kHz RC Oscillator Characteristics (Device Variant A)
Symbol Parameter Conditions Min. Typ. Max. Units
f
OUT
Average Output frequency fREF = 32.768kHz 47.76 48 48.24 MHz
f
REF
Reference frequency
I
0.732 32.768 33 kHz
Jitter Period Jitter fREF = 32.768kHz - - 1.04 ns
I
DFLL
Power consumption on V
DDIN
fREF = 32.768kHz - 425 482 A
t
LOCK
Lock time
fREF = 32.768kHz
DFLLVAL.COARSE =
DFLL48M COARSE CAL
DFLLVAL.FINE = 512
DFLLCTRL.BPLCKC = 1
DFLLCTRL.QLDIS = 0
DFLLCTRL.CCDIS = 1
DFLLMUL.FSTEP = 10
100 200 500 s
Symbol Parameter Conditions Min. Typ. Max. Units
f
OUT
Average Output frequency fREF = 32.768kHz 47.76 48 48.24 MHz
f
REF
Reference frequency
I
0.732 32.768 33 kHz
Jitter Period Jitter fREF = 32.768kHz - - 0.42 ns
I
DFLL
Power consumption on V
DDIN
fREF = 32.768kHz - 403 453 µA
t
LOCK
Lock time
fREF = 32.768kHz
DFLLVAL.COARSE =
DFLL48M COARSE CAL
DFLLVAL.FINE = 512
DFLLCTRL.BPLCKC = 1
DFLLCTRL.QLDIS = 0
DFLLCTRL.CCDIS = 1
DFLLMUL.FSTEP = 10
200 500 s
Symbol Parameter Conditions Min. Typ. Max. Units
f
OUT
Output frequency
Calibrated against a 32.768kHz
reference at 25 C, over [-40, +125]C,
over [1.62, 3.63]V
28.508 32.768 35.389
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