Atmel Xplained Pro Evaluation Kit for the ATSAMD21J18A Microcontroller ATSAMD21-XPRO ATSAMD21-XPRO Fiche De Données
Codes de produits
ATSAMD21-XPRO
954
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181C–SAM-D21_Datasheet–07/2014
36.11.3 Digital Frequency Locked Loop (DFLL48M) Characteristics
Table 36-40. DFLL48M Characteristics - Open Loop Mode
Note:
1. DFLL48M in Open loop after calibration at room temperature.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Units
f
OUT
Output frequency
I
DFLLVAL.COARSE =
DFLL48M COARSE CAL
DFLLVAL.FINE = 512
DFLL48M COARSE CAL
DFLLVAL.FINE = 512
47
48
49
MHz
I
DFLL
Power consumption on V
DDANA
I
DFLLVAL.COARSE =
DFLL48M COARSE CAL
DFLLVAL.FINE = 512
DFLL48M COARSE CAL
DFLLVAL.FINE = 512
-
140
-
µA
t
STARTUP
Startup time
DFLLVAL.COARSE =
DFLL48M COARSE CAL
DFLLVAL.FINE = 512
f
DFLL48M COARSE CAL
DFLLVAL.FINE = 512
f
OUT
within 90% of final value
7
8
9
µs
Table 36-41. DFLL48M Characteristics - Closed Loop Mode
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
DDANA
fREF = 32 .768kHz
-
425
-
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
DFLLVAL.COARSE =
DFLL48M COARSE CAL
DFLLVAL.FINE = 512
DFLLCTRL.BPLCKC = 1
DFLLCTRL.QLDIS = 0
DFLLCTRL.CCDIS = 1
DFLLMUL.FSTEP = 10
100
200
500
µs