Atmel SAM4S Series, Предварительный информационный лист

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1107
11100B–ATARM–31-Jul-12
SAM4S Series [Preliminary]
42.4 Oscillator Characteristics
42.4.1 32 kHz RC Oscillator Characteristics
42.4.2 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 com-
mand (see EEFC section) and the frequency can be trimmed by software through the PMC.
Table 42-15. 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/
+85°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
540 860 nA
Table 42-16. 4/8/12 MHz RC Oscillators Characteristics
Symbol Parameter Conditions Min Typ Max Unit
F
Range
RC Oscillator Frequency Range
(1)
4 12 MHz
ACC
4
4 MHz Total Accuracy
-40°C<Temp<+85°C
4 MHz output selected
(1)(2)
±30 %
ACC
8
8 MHz Total Accuracy
-40°C<Temp<+85°C
8 MHz output selected
(1)(2)
±30
%
-40°C<Temp<+85°C
8 MHz output selected
(1)(3)
±5
ACC
12
12 MHz Total Accuracy
-40°C<Temp<+85°C
12 MHz output selected
(1)(2)
±30
%
-40°C<Temp<+85°C
12 MHz output selected
(1)(3)
±5
Frequency deviation versus
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
Active Current Consumption
(2)
4MHz
8MHz
12MHz
50
65
82 75
95
118
µA