Hitachi AP1 Data Book page 362

HMCS404CL--------------------------------------------------------------------------
• INTERNAL OSCILLATOR CIRCUIT
can be selected from a crystal oscillator or a ceramic filter
oscillator. In any cases, external clock operation is available.
Fig. 16 gives internal oscillator circuit. The oscillator type
• Oscillator Circuit
External clock
operation
Ceramic filter
oscillator
Crystal
oscillator
OSC.
l>
Oscillator
OSC.
<J
Divider
circuit
1/8
Timing
generator
circuit
SyStem
clock
Fig.
16
Internal Oscillator Circuit
Table
20
Examples of Oscillator Circuit
Circu it configuration
Oscillator
D-
OSC,
Open- OSC.
£ f;~~~;'
,OSC'
It---4- ~
OSC2
C2
~
______ _
GND
CI
t
rysta;L OSCI
Sf!
:ff
~J\""
•
. r
VlY
OSC2
C2
~
______ _
GND
GT cut parallel resonance crystal
~,~
OS~~C2
Co
Remarks
Ceramic filter CSA2.000MK (Murata)
Rf : lMn ±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)
Rf : 2Mn±2%
C. : 10-22pF±20%
C. : 10-22pF±20%
Crystal: GT cut parallel resonance crystal
Co : 7pF max.
Rs : lOon max.
f : 2.0 - 2.25MHz
• 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 Rf, C, and C •.
360