Datasheet

111
XMEGA A1U [DATASHEET]
Atmel-8385H-AVR-ATxmega64A1U-128A1U-Datasheet–AVR–04/2014
37.2.14.7 External 16MHz crystal oscillator and XOSC characteristics
Table 37-61. External 16MHz crystal oscillator and XOSC characteristics..
Symbol Parameter Condition Min. Typ. Max. Units
Cycle to cycle jitter
FRQRANGE=0 <10
ns
FRQRANGE=1, 2, 3 <1
Frequency error
FRQRANGE=0 <0.5
%
FRQRANGE=1 <0.05
FRQRANGE=2 <0.005
FRQRANGE=3 <0.005
Duty cycle
FRQRANGE=0 50
FRQRANGE=1 50
FRQRANGE=2 50
FRQRANGE=3 50
R
Q
Negative impedance
(1)
FRQRANGE=0
0.4MHz resonator, CL=100pF 13k

1MHz crystal, CL=20pF 9k
2MHz crystal, CL=20pF 2.2k
FRQRANGE=1
1MHz crystal, CL=20pF 2.3k
2MHz crystal, CL=20pF 8k
9MHz crystal, CL=20pF 200
FRQRANGE=2
8MHz crystal, CL=20pF 225
9MHz crystal, CL=20pF 300
12MHz crystal, CL=10pF 175
FRQRANGE=3
8MHz crystal, CL=20pF 340
9MHz crystal, CL=20pF 400
12MHz crystal, CL=10pF 330
12MHz crystal, CL=12pF 230
16MHz crystal, CL=10pF 115
ESR SF = safety factor min(R
Q
)/SF k