Datasheet

SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
1430
47.4 Oscillator Characteristics
47.4.1 32 kHz RC Oscillator Characteristics
47.4.2 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 (see the EEFC section) and the frequency can be trimmed by software through the PMC.
Table 47-16. 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
T
A
Range = -40°C to +105°C
Typical Consumption at 2.2V
supply and
T
A
= 25°C
— 540 860 nA
Table 47-17. 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<
T
A
<+105°C
4 MHz output selected
(1)(2)
——±30 %
ACC
8
8 MHz Total Accuracy
-40°C<
T
A
<+105°C
8 MHz output selected
(1)(2)
——±30
%
-40°C<
T
A
<+105°C
8 MHz output selected
(1)(3)
—— ±5
ACC
12
12 MHz Total Accuracy
-40°C<
T
A
<+105°C
12 MHz output selected
(1)(2)
——±30
%
-40°C<T
A
<+105°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
12 MHz
—
—
—
50
65
82
75
95
118
µA