ATXMEGA128B3-AU ATMEL [ATMEL Corporation], ATXMEGA128B3-AU Datasheet - Page 84
ATXMEGA128B3-AU
Manufacturer Part Number
ATXMEGA128B3-AU
Description
8/16-bit Atmel XMEGA B3 Microcontroller
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.ATXMEGA128B3-AU.pdf
(137 pages)
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36.14.8
Table 36-28. External 32.768kHz crystal oscillator and TOSC characteristics
Note:
8074B–AVR–02/12
Symbol
ESR/R1
C
IN_TOSC
1. See
External 32.768kHz crystal oscillator and TOSC characteristics
Parameter
Recommended crystal equivalent
series resistance (ESR)
Input capacitance between TOSC pins
Recommended Safety factor
Long term Jitter (SIT)
Figure 36-4 on page 84
Figure 36-4. TOSC input capacitance
The input capacitance between the TOSC pins is C
when oscillating without external capacitors.
for definition
T
O
Crystal load capacitance 6.5pF
Crystal load capacitance 9.0pF
Crystal load capacitance 12.0pF
Normal mode
Low power mode
capacitance load matched to
crystal specification
S
C
1
Condition
32.768kHz crystal
Device internal
C
L1
External
C
L1
L2
+ C
L2
Min
3
in series as seen from the crystal
T
O
Typ
S
3.5
3.5
0
C
2
XMEGA B3
Max
60
35
28
Units
kΩ
pF
%
84
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