Atmel ARM-Based Evaluation Kit for SAM4S16C, 32-Bit ARM® Cortex® Microcontroller ATSAM4S-WPIR-RD ATSAM4S-WPIR-RD データシート
製品コード
ATSAM4S-WPIR-RD
SAM4S Series [DATASHEET]
Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14
1144
44.5
Oscillator Characteristics
44.5.1 32 kHz RC Oscillator Characteristics
44.5.2 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
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.
Table 44-25.
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
-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
Temp. range = -40°C to +125°C
Typical consumption at 2.2V
supply and Temp = 25°C
—
540
860
nA
Table 44-26.
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
—
—
±30
%
ACC
8
8 MHz Total Accuracy
-40°C < Temp < +105°C
8 MHz output selected
—
—
±30
%
-40°C < Temp < +105°C
8 MHz output selected
—
—
±5
ACC
12
12 MHz Total Accuracy
-40°C < Temp < +105°C
12 MHz output selected
—
—
±30
%
-40°C < Temp < +105°C
12MHz output selected
—
—
±5
Frequency Deviation versus
Trimming Code
8 MHz
12 MHz
—
47
64
64
—
kHz/trimming code
Duty
Duty Cycle
45
50
55
%
t
ON
Startup Time
—
—
10
µs
I
DDON
Active Current Consumption
4 MHz
8 MHz
12 MHz
—
50
65
82
65
82
75
95
95
118
µA