Hitachi AP1 Data Book page 249

--------------------------------------------------------------HMCS404C
• INTERNAL OSCILLATOR CIRCUIT
Fig. 16 gives internal oscillator circuit. The oscillator type
can be selected from the followings; crystal oscillator, ceramic
filter oscillator, or resistor oscillator as shown in Table 20. In
any cases, external clock operation is available.
OSC.
[>
OSC.
<J
Oscillator
(Selectable
with mask
options)
Divider
circuit
1/8
Timing
generator
circuit
Fig. 16 Internal Oscillator Circuit
System
clock
• Oscillator Circuit
External clock
operation
Resistor
oscillator
Ceramic filter
oscillator
Crystal
oscillator
Table 20 Examples of Oscillator Circuit
Circuit configuration
Oscillator
D-
OSC,
Open- OSC.
e
sc.
Rf
OSC.
cerami1~~~
OSC,
filter
T~
:F
f
L~""OSC2
C2
~
______ _
GND
ATcut parallel resonance crystal
~,~
O~f--2-IOsC.
Co
Remarks
Rf: 20kn±2%
Ceramic filter CSA4.00MG (Murata)
Af : 1MO±2%
C. : 30pF±20%
C , : 30pF± 20%
• Wiring between these pins and elements should be as short as possible,
and never cross the other wirings. (Refer to Fig. 17)
Af : 1MO±2%
C. : 10-22pF±20%
C. : 10-22pF±20%
Crystal: ATcut parallel resonance crystal
Co : 7pF max.
As :600 max.
f : 2.0-4.SMHz
.Wiring between these pins should be as short as possible, and
never cross the other wirings. (Refer to Fig. 17)
Note) Please consult with the engineers of crystal or ceramic filter maker to determine the value of Af, C. and C •.
247