Datasheet

173
XMEGA D3 [DATASHEET]
Atmel-8134N-ATxmega32D3-64D3-128D3-192D3-256D3-384D3_datasheet–03/2014
Note: 1. Numbers for negative impedance are not tested in production but guaranteed from design and characterization.
32.6.13.8 External 32.768kHz crystal oscillator and TOSC characteristics
Table 32-172. External 32.768kHz crystal oscillator and TOSC characteristics.
Note: See Figure 32-39 for definition.
Start-up time
XOSCPWR=0,
FRQRANGE=0
0.4MHz resonator,
CL=100pF
1.0
ms
XOSCPWR=0,
FRQRANGE=1
2MHz crystal, CL=20pF 2.6
XOSCPWR=0,
FRQRANGE=2
8MHz crystal, CL=20pF 0.8
XOSCPWR=0,
FRQRANGE=3
12MHz crystal, CL=20pF 1.0
XOSCPWR=1,
FRQRANGE=3
16MHz crystal, CL=20pF 1.4
C
XTAL1
Parasitic capacitance
XTAL1 pin
5.9
pF
C
XTAL2
Parasitic capacitance
XTAL2 pin
8.3
C
LOAD
Parasitic capacitance load 3.5
Symbol Parameter Condition Min. Typ. Max. Units
ESR/R1
Recommended crystal equivalent
series resistance (ESR)
Crystal load capacitance 6.5pF 60
kCrystal load capacitance 9.0pF 35
Crystal load capacitance 12pF 28
C
TOSC1
Parasitic capacitance TOSC1 pin 3.5
pF
C
TOSC2
Parasitic capacitance TOSC2 pin 3.5
Recommended safety factor
Capacitance load matched to crystal
specification
3
Symbol Parameter Condition Min. Typ. Max. Units