SAM4L Datasheet, PDF (1129/1185 Pages) ATMEL Corporation – ATSAM ARM-based Flash MCU

ATSAM4L4/L2
Table 42-24. Digital Frequency Locked Loop Characteristics
Symbol
t_STARTUP
t_LOCK
Parameter
Startup time⁽¹⁾
Lock time⁽¹⁾
Conditions
Min
Within 90% of final values
f_REF = 32kHz, FINE lock, SSG disabled⁽²⁾
f_REF = 32kHz, ACCURATE lock, dithering
clock = RCSYS/2, SSG disabled⁽²⁾
Typ
600
1100
Max
Unit
100
µs
1.
These values are based on simulation. These values are not covered by test limits in production or characterization.
2.
Spread Spectrum Generator (SSG) is disabled by writing a zero to the EN bit in the SCIF.DFLL0SSG register.
42.6.5 32kHz RC Oscillator (RC32K) Characteristics
Table 42-25. 32kHz RC Oscillator Characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
f_OUT
Output frequency ⁽¹⁾
Calibrated against a 32.768kHz
reference
Temperature compensation disabled
20
32.768
44
Without temperature compensation
0.5
I_RC32K
Current consumption ⁽²⁾
Temperature compensation enabled
2
t_STARTUP
Startup time⁽¹⁾
1
1.
These values are based on characterization. These values are not covered by test limits in production.
2.
These values are based on simulation. These values are not covered by test limits in production or characterization.
Unit
kHz
µA
µA
cycle
42.6.6 System RC Oscillator (RCSYS) Characteristics
Table 42-26. System RC Oscillator Characteristics
Symbol
f_OUT
I_RCSYS
t_STARTUP
Duty
Parameter
Output frequency ⁽¹⁾
Current consumption ⁽²⁾
Startup time⁽¹⁾
Duty cycle⁽¹⁾
Conditions
Calibrated at 85°C
Min
Typ
Max
Unit
110
113.6
116
kHz
12
µA
25
38
63
µs
49.6
50
50.3
%
1.
These values are based on characterization. These values are not covered by test limits in production.
2.
These values are based on simulation. These values are not covered by test limits in production or characterization.
42023C–SAM–02/2013
1129