96
XTAL
EXTAL
C
L1
= C
L2
=10–22 pF
C
L1
Rd
C
L2
Figure 7.2 Connection of Crystal Resonator (Example)
Table 7.1
Damping Resistance
Frequency [MHz]
2
4
8
12
16
20
Rd [
Ω
]
1k
500
200
0
0
0
Crystal Resonator: Figure 7.3 shows an equivalent circuit of the crystal resonator. Use a crystal
resonator with the characteristics listed in table 7.2.
C
0
XTAL
EXTAL
C
L
L
Rs
Figure 7.3 Crystal Resonator Equivalent Circuit
Table 7.2
Crystal Resonator Parameters
Frequency (MHz)
Parameter
2
4
8
12
16
20
Rs max [
Ω
]
500
120
80
60
50
40
Co max [pF]
7
7
7
7
7
7
Содержание HD6417032
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