
1025
SAM4CP [DATASHEET]
43051E–ATPL–08/14
45.5.10 Oscillator Characteristics
45.5.10.1 32 kHz RC Oscillator
45.5.10.2 4/8/12 MHz RC Oscillators
Notes: 1.
Frequency range can be configured in the PMC Clock Generator.
Table 45-22. 32 kHz RC Oscillator Characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
V
VDDBU
Supply Voltage Range (VDDBU)
1.62
3.3
3.6
V
f
0
Frequency initial accuracy
VDDBU = 3.3V,
T
A
= 27°C
VDDBU from 1.6V to 3.6V
26
32
39
kHz
dF/dV
Frequency Drift with VDDBU
0.5
1.5
2.5
% / V
dF/dT
Frequency Drift with Temperature
T
A
= [-40°C to +27°C]
T
A
= [27°C to 85°C]
—
+8
+17
%
—
+6
+13
Duty
Duty Cycle
48
50
52
%
t
ON
I
DDON
Startup Time
—
—
100
μ
s
Current Consumption (VDDBU)
—
150
300
nA
Table 45-23. 4/8/12 MHz RC Oscillators Characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
V
VDDCORE
f
Range
Supply Voltage Range (VDDCORE)
Output Frequency Range
(1)
1.08
1.2
1.32
V
4
—
12
MHz
ACC
4
4 MHz range;
total accuracy
-40°C < T
A
< +85°C
—
—
± 30
%
ACC
8
8 MHz range;
total accuracy
VDDCORE from 1.08V to 1.32V
T
A
= 25°C
0°C < T
A
< +70°C
-40°C < T
A
< +85°C
VDDCORE from 1.08V to 1.32V
T
A
= 25°C
0°C < T
A
< +70°C
-40°C < T
A
< +85°C
—
—
± 1.0
± 3.0
± 5.0
%
ACC
12
12 MHz range;
total accuracy
—
—
± 1.0
± 3.0
± 5.0
%
f
STEP
Frequency trimming step size
8 MHz
12 MHz
—
47
64
—
kHz
Duty
Duty Cycle
45
50
55
%
t
ON
Startup Time, MOSCRCEN from 0 to 1
—
—
10
μ
s
t
Stab
Stabilization time on RC Frequency
change (MOSCRCF)
—
—
5
μ
s
I
DDON
Active
(VDDCORE)
Current
Consumption
4 MHz
8 MHz
12 MHz
—
50
65
82
68
86
102
μ
A