Datasheet

710
11011B–ATARM–21-Feb-12
SAM3N
35.4 Crystal Oscillators Characteristics
35.4.1 32 kHz RC Oscillator Characteristics
35.4.2 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
Table 35-19. 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/
+85°C) versus 25°C
-11 11 %
Duty Duty Cycle 45 50 55 %
T
ON
Startup Time 100 µs
I
DDON
Current Consumption
After Startup Time
Temp. Range = -40°C to +85°C
Typical Consumption at 2.2V
supply and Temp = 25°C
540 870 nA
Table 35-20. 4/8/12 MHz RC Oscillators Characteristics
Symbol Parameter Conditions Min Typ Max Unit
F
Range
RC Oscillator Frequency Range
(1)
412MHz
ACC
4
4 MHz Total Accuracy
-40°C<Temp<+85°C
4 MHz output selected
(1)(2)
±35 %
ACC
8
8 MHz Total Accuracy
-40°C<Temp<+85°C
8 MHz output selected
(1)(3)
±3.5 %
-20°C<Temp<+85°C
8 MHz output selected
(1)(3)
±2.5 %
0°C<Temp<+70°C
8 MHz output selected
(1)(3)
±2 %
ACC
12
12 MHz Total Accuracy
-40°C<Temp<+85°C
12 MHz output selected
(1)(3)
±3.5 %
-20°C<Temp<+85°C
12 MHz output selected
(1)(3)
±2.7 %
0°C<Temp<+70°C
12 MHz output selected
(1)(3)
±2 %
Frequency deviation versus
trimming code
8 MHz
12 MHz
49.2
37.5
kHz/trimming code
Duty Duty Cycle 45 50 55 %
T
ON
Startup Time 10 µs
I
DDON
Active Current Consumption
4MHz
8MHz
12MHz
80
105
145
120
160
210
µA