MB89120 データシートの表示（PDF） - Fujitsu
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MB89120 Datasheet PDF : 47 Pages
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MB89120/120A Series
(3) Clock Timings
Parameter
Clock frequency
Clock cycle time
Input clock pulse width
Input clock rising/falling time
Symbol
FCH
FCL
tHCYL
tLCYL
PWH1
PWL1
tCR1
tCF1
Pin
X0, X1
X0A, X1A
X0, X1
X0A, X1A
X0
X0
Min.
1
238
72
Value
Typ.
32.768
30.5
(VSS = 0.0 V, TA = −40 °C to +85 °C)
Max.
4.2
1000
Unit
Remarks
MHz Main clock
kHz Subclock
ns Main clock
µs Subclock
ns External clock
24 ns External clock
X0, X1 Timings and Conditions of Applied Voltage
tHCYL
X0
PWH1
PWL1
tCF1
0.8 VCC
0.2 VCC
tCR1
Main Clock Conditions of Applied Voltage
When a crystal
or
ceramic resonator is used
X0
X1
FCH
C0
C1
When an external clock is used
X0
X1
Open
FCH
30
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