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ATSAM4S-XPLD
1057
SAM4S [DATASHEET]
11100E–ATARM–24-Jul-13
43.4
Oscillator Characteristics
43.4.1 32 kHz RC Oscillator Characteristics
43.4.2 4/8/12 MHz RC Oscillators Characteristics
Notes: 1. Frequency range can be configured in the Supply Controller registers
2. Not trimmed from factory
3. After trimming from factory
The 4/8/12 MHz Fast RC oscillator is calibrated in production. This calibration can be read through the Get CALIB bit command
(refer to the EEFC section) and the frequency can be trimmed by software through the PMC.
(refer to the EEFC section) and the frequency can be trimmed by software through the PMC.
Table 43-19. 32 kHz RC Oscillator Characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
RC Oscillator Frequency
20
32
44
kHz
Frequency Supply Dependency
-3
3
%/V
Frequency Temperature Dependency
Over temperature range (-40°C/
+105°C) versus 25°C
+105°C) versus 25°C
-7
—
7
%
Duty
Duty Cycle
45
50
55
%
T
ON
Startup Time
—
—
100
μs
I
DDON
Current Consumption
After startup time
Temp. range = -40°C to +125°C
Typical consumption at 2.2V
supply and Temp = 25°C
supply and Temp = 25°C
—
540
860
nA
Table 43-20. 4/8/12 MHz RC Oscillators Characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
F
Range
RC Oscillator Frequency Range
4
12
MHz
ACC
4
4 MHz Total Accuracy
-40°C<Temp<+105°C
4 MHz output selected
4 MHz output selected
—
—
±30
%
ACC
8
8 MHz Total Accuracy
-40°C<Temp<+105°C
8 MHz output selected
8 MHz output selected
—
—
±30
%
-40°C<Temp<+105°C
8 MHz output selected
8 MHz output selected
—
—
±5
ACC
12
12 MHz Total Accuracy
-40°C<Temp<+105°C
12 MHz output selected
12 MHz output selected
—
—
±30
%
-40°C<Temp<+105°C
12MHz output selected
12MHz output selected
—
—
±5
Frequency Deviation versus
Trimming Code
Trimming Code
8 MHz
12 MHz
—
47
64
—
kHz/trimming code
Duty
Duty Cycle
45
50
55
%
T
ON
Startup Time
—
—
10
μs
I
DDON
4 MHz
8 MHz
8 MHz
12 MHz
—
50
65
82
75
95
118
μA