Datasheet

XMEGA A4U [DATASHEET]
Atmel-8387G-AVR-ATxmega16A4U-34A4U-64A4U-128A4U-Datasheet_03/2014
152
Note: 1. Numbers for negative impedance are not tested in production but guaranteed from design and characterization.
Duty cycle
XOSCPWR=0
FRQRANGE=0 40
%
FRQRANGE=1 42
FRQRANGE=2 or 3 45
XOSCPWR=1 48
R
Q
Negative impedance
(1)
XOSCPWR=0,
FRQRANGE=0
0.4MHz resonator,
CL=100pF
2.4k

1MHz crystal, CL=20pF 8.7k
2MHz crystal, CL=20pF 2.1k
XOSCPWR=0,
FRQRANGE=1,
CL=20pF
2MHz crystal 4.2k
8MHz crystal 250
9MHz crystal 195
XOSCPWR=0,
FRQRANGE=2,
CL=20pF
8MHz crystal 360
9MHz crystal 285
12MHz crystal 155
XOSCPWR=0,
FRQRANGE=3,
CL=20pF
9MHz crystal 365
12MHz crystal 200
16MHz crystal 105
XOSCPWR=1,
FRQRANGE=0,
CL=20pF
9MHz crystal 435
12MHz crystal 235
16MHz crystal 125
XOSCPWR=1,
FRQRANGE=1,
CL=20pF
9MHz crystal 495
12MHz crystal 270
16MHz crystal 145
XOSCPWR=1,
FRQRANGE=2,
CL=20pF
12MHz crystal 305
16MHz crystal 160
XOSCPWR=1,
FRQRANGE=3,
CL=20pF
12MHz crystal 380
16MHz crystal 205
ESR SF = Safety factor min(RQ)/SF k
C
XTAL1
Parasitic capacitance
XTAL1 pin
5.45 pF
C
XTAL2
Parasitic capacitance
XTAL2 pin
7.51 pF
C
LOAD
Parasitic capacitance
load
3.16 pF
Symbol Parameter Condition Min. Typ. Max. Units