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HD404369F Folha de dados(PDF) 43 Page - Renesas Technology Corp

Nome de Peças HD404369F
Descrição Electrónicos  microcomputer has an A/D converter
PDF  117 Pages
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Fabricante Electrônico  RENESAS [Renesas Technology Corp]
Página de início  http://www.renesas.com
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HD404369F Folha de dados(HTML) 43 Page - Renesas Technology Corp

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HD404369 Series
41
Table 20
Oscillator Circuit Examples
Circut Configuration
Circut Constants
External clock
operation
External
oscillator
OSC
Open
1
OSC
2
Ceramic oscillator
(OSC
1, OSC 2)
OSC
2
C1
2
C
OSC
1
Rf
Ceramic
GND
Ceramic oscillator: CSA4.00MG (Murata)
R
f = 1 MΩ ±20%
C
1 = C2 = 30 pF ±20%
Crystal oscillator
(OSC
1, OSC 2)
OSC
2
C1
2
C
OSC
1
Rf
Crystal
GND
L
S
C
RS
C0
OSC1
OSC2
R
f = 1 MΩ ±20%
C
1 = C2 = 10 to 22 pF ±20%
Crystal: Equivalent to circuit shown below
C
0 = 7 pF max.
R
S = 100 Ω max.
Crystal oscillator
(X1, X2)
X1
C1
2
C
X2
Crystal
GND
L
S
C
RS
C0
X1
X2
Crystal: 32.768 kHz: MX38T
(Nippon Denpa)
C
1 = C2 = 20 pF ±20%
R
S = 14 kΩ
C
0 = 1.5 pF
Notes: 1. Since the circuit constants change depending on the crystal or ceramic oscillator and stray
capacitance of the board, the user should consult with the crystal or ceramic oscillator
manufacturer to determine the circuit parameters.
2. Wiring among OSC
1, OSC 2, X1, X2 and elements should be as short as possible, and must not
cross other wiring (see figure 25).
3. When a 32.768-kHz crystal oscillator is not used, fix pin X1 to GND and leave pin X2 open.



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