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HD6433636SW Folha de dados(PDF) 97 Page - Renesas Technology Corp

Nome de Peças HD6433636SW
Descrição Electrónicos  8-Bit Microcomputer
PDF  418 Pages
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Fabricante Electrônico  RENESAS [Renesas Technology Corp]
Página de início  http://www.renesas.com
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HD6433636SW Folha de dados(HTML) 97 Page - Renesas Technology Corp

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83
4.3
Subclock Generator
Connecting a 32.768-kHz Crystal Oscillator: Clock pulses can be supplied to the subclock
divider by connecting a 32.768-kHz crystal oscillator, as shown in figure 4.7. Follow the same
precautions as noted in 4.2, Notes on Board Design.
X
X
C1
C2
1
2
C = C
= 15 pF (typ.)
12
Figure 4.7 Typical Connection to 32.768-kHz Crystal Oscillator
Figure 4.8 shows the equivalent circuit of the 32.768-kHz crystal oscillator.
CS
C0
LRS
X1
X2
C = 1.5 pF typ
R = 14 k
typ
f
= 32.768 kHz
Crystal oscillator: MX38T
(Nihon Denpa Kogyo)
0
S
W
Ω
S
Figure 4.8 Equivalent Circuit of 32.768-kHz Crystal Oscillator
Pin Connection when Not Using Subclock: When the subclock is not used, connect pin X
1 to
V
CC and leave pin X2 open, as shown in figure 4.9.
X
X
1
2
VCC
Open
Figure 4.9 Pin Connection when not Using Subclock



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