Datasheet

956
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181C–SAM-D21_Datasheet–07/2014
36.11.6 8MHz RC Oscillator (OSC8M) Characteristics
Table 36-44. Internal 8MHz RC Oscillator Characteristics
36.11.7 Fractional Digital Phase Locked Loop (FDPLL96M) Characteristics
Table 36-45. FDPLL96M Characteristics
(1)
Note: 1. All values have been characterized with FILTSEL[1/0] as default value.
Symbol Parameter Conditions Min. Typ. Max. Units
f
OUT
Output frequency
I Calibrated against a 8MHz reference
at 25°C, over [-40, +85]C, over [1.62,
3.63]V
7.8 8 8.16
MHzCalibrated against a 8MHz reference
at 25°C, at V
DD
=3.3V
7.94 8 8.06
Calibrated against a 8MHz reference
at 25°C, over [1.62, 3.63]V
7.92 8 8.08
I
OSC8M
Current consumption
IIDLE IDLE2 on OSC32K versus IDLE2 on
calibrated OSC8M enabled at 8MHz
(FRANGE=1, PRESC=0)
64 µA
t
STARTUP
Startup time
I
- 2.1 3 µs
Duty Duty cycle
I
- 50 - %
Symbol Parameter Conditions Min. Typ. Max. Units
f
IN
Input frequency 32 - 2000 KHz
f
OUT
Output frequency 48 - 96 MHz
I
FDPLL96M
Current consumption
f
IN
= 32 kHz, f
OUT
= 48 MHz 500 700
µA
f
IN
= 32 kHz, f
OUT
= 96 MHz 900 1200
Jp Period jitter
f
IN
= 32 kHz, f
OUT
= 48 MHz - 1.5 2.0
%
f
IN
= 32 kHz, f
OUT
= 96 MHz 3.0 10.0
f
IN
= 2 MHz, f
OUT
= 48 MHz 1.3 2.0
f
IN
= 2 MHz, f
OUT
= 96 MHz 3.0 7.0
t
LOCK
Lock Time
After startup, time to get lock
signal.
f
IN
= 32 kHz, f
OUT
= 96 MHz
1.3 2 ms
f
IN
= 2 MHz, f
OUT
= 96 MHz 25 50 µs
Duty Duty cycle 40 50 60 %