Data Sheet

974
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181G–SAM-D21_Datasheet–09/2015
Table 36-50. DFLL48M Characteristics - Closed Loop Mode, Device Variant A
Symbol Parameter Conditions Min. Typ. Max. Units
f
OUT
Average Output frequency fREF = 32.768kHz 47 48 49 MHz
f
REF
Reference frequency
I
0.732 32.768 33 kHz
Jitter Cycle to Cycle jitter fREF = 32.768kHz - - 0.42 ns
I
DFLL
Power consumption on V
DDIN
fREF = 32 768kHz - 425 482 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
100 200 500 µs
Table 36-51. DFLL48M Characteristics - Closed Loop Mode, Device Variant B
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 Cycle to Cycle 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 µs