ATxmega128D4-AU ATMEL [ATMEL Corporation], ATxmega128D4-AU Datasheet - Page 80
ATxmega128D4-AU
Manufacturer Part Number
ATxmega128D4-AU
Description
8/16-bit Atmel XMEGA D4 Microcontroller
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.ATXMEGA128D4-AU.pdf
(136 pages)
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32.13.8
Table 32-27. External 32.768kHz crystal oscillator and TOSC characteristics.
Note:
8135L–AVR–06/12
Symbol
ESR/R1
C
C
TOSC1
TOSC2
1. See
External 32.768kHz crystal oscillator and TOSC characteristics
Parameter
Recommended crystal equivalent
series resistance (ESR)
Parasitic capacitance TOSC1 pin
Parasitic capacitance TOSC2 pin
Recommended safety factor
Figure 32-4
for definition.
Figure 32-4. TOSC input capacitance.
The parasitic capacitance between the TOSC pins is C
when oscillating without external capacitors.
T
O
Crystal load capacitance 6.5pF
Crystal load capacitance 9.0pF
Alternate TOSC
Alternate TOSC
capacitance load matched to
crystal specification
S
C
1
Condition
32.768KHz crystal
Device internal
C
L1
External
C
L2
L1
+ C
Min.
L2
3
in series as seen from the crystal
T
O
Typ.
S
5.4
4.0
7.1
4.0
C
2
XMEGA D4
Max.
60
35
Units
kΩ
pF
pF
80
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