Datasheet

125
42023GS–SAM–03/2014
ATSAM4L8/L4/L2
9.7.5 32kHz RC Oscillator (RC32K) Characteristics
9.7.6 System RC Oscillator (RCSYS) Characteristics
t
STARTUP
Startup time
(1)
Within 90% of final values 100 µs
t
LOCK
Lock time
(1)
f
REF
= 32kHz, FINE lock, SSG disabled
(2)
600
f
REF
= 32kHz, ACCURATE lock, dithering
clock = RCSYS/2, SSG disabled
(2)
1100
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.
Table 9-28. 32kHz RC Oscillator Characteristics
Symbol Parameter Conditions Min Typ Max Unit
f
OUT
Output frequency
(1)
1. These values are based on characterization. These values are not covered by test limits in production.
Calibrated against a 32.768kHz
reference
Temperature compensation disabled
20 32.768 44 kHz
I
RC32K
Current consumption
(2)
2. These values are based on simulation. These values are not covered by test limits in production or characterization.
Without temperature compensation 0.5 µA
Temperature compensation enabled 2 µA
t
STARTUP
Startup time
(1)
1 cycle
Table 9-29. System RC Oscillator Characteristics
Symbol Parameter Conditions Min Typ Max Unit
f
OUT
Output frequency
(1)
1. These values are based on characterization. These values are not covered by test limits in production.
Calibrated at 85°C 110 113.6 116 kHz
I
RCSYS
Current consumption
(2)
2. These values are based on simulation. These values are not covered by test limits in production or characterization.
12 µA
t
STARTUP
Startup time
(1)
25 38 63 µs
Duty Duty cycle
(1)
49.6 50 50.3 %
Table 9-27. Digital Frequency Locked Loop Characteristics
Symbol Parameter Conditions Min Typ Max Unit