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| HD404629R Datasheet, PDF (48/157 Pages) Renesas Technology Corp – AS Microcomputer Incorporating a DTMF Generator Circuit | |||
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HD404629R Series
Table 22 Oscillator Circuit Examples
External clock
operation
Circuit Configuration
External
oscillator
OSC 1
Open
OSC2
Circuit Constants
â
Ceramic oscillator
(OSC1, OSC2)
Crystal oscillator
(OSC1, OSC2)
Crystal oscillator
(X1, X2)
C1
Ceramic
oscillator
C2
GND
OSC1
Rf
OSC2
C1
Crystal
Rf
oscillator
C2
GND
OSC1
OSC2
Ceramic oscillator: CSB400P22 (Murata)
CSB400P (Murata)
Rf = 1 M⦠± 20%
C1 = C2 = 220 pF ± 5%
Ceramic oscillator: CSB800J122 (Murata),
CSB800J (Murata)
Rf = 1 M⦠± 20%
C1 = C2 = 220 pF ± 5%
Ceramic oscillator: CSA2.00MG (Murata)
Rf = 1 M⦠± 20%
C1 = C2 = 30 pF ± 20%
Ceramic oscillator: CSA4.00MG (Murata)
Rf = 1 M⦠± 20%
C1 = C2 = 30 pF ± 20%
Rf = 1 M⦠± 20%
C1 = C2 = 10 to 22pF ± 20%
Crystal : Equivalent circuit at left
C0 =7pF max
Rs = 100⦠max
f = 400kHz, 800kHz, 2MHz, 4MHz
OSC1
L CS RS
OSC2
C1
Crystal
oscillator
C2
GND
L
C0
X1
X2
CS RS
Crystal oscillator: 32.768 kHz: MX38T
(Nippon Denpa)
C1 = C2 = 20 pF ± 20%
RS: 14 kâ¦
C0: 1.5 pF
X1
X2
C0
46
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