MB89538APFM 查看數據表（PDF） - Fujitsu
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MB89538APFM Datasheet PDF : 62 Pages
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MB89530A Series
(3) Clock Timing Standards
(AVss = Vss = 0 V, TA = −40 °C to +85 °C)
Parameter
Symbol
Pin name
Condi-
tion
Min
Value
Typ
Unit
Max
Remarks
Clock frequency
FCH
X0, X1
FCL X0A, X1A
1
12.5 MHz Main clock
32.768
kHz Sub clock
Clock cycle time
tHCYL
tLCYL
X0, X1
X0A, X1A
80
1000 ns Main clock
30.5
µs Sub clock
PWH
PWL
X0
20
ns External clock
Input clock pulse width
PWHH
PWLL
X0A
15.2
µs External clock
Input clock rise, fall
tCR
time
tCF
X0
10
ns External clock
• X0, X1 timing and application conditions
tHCYL
PWH
PWL
tCR
tCF
0.8 VCC
0.8 VCC
X0
0.2 VCC
0.2 VCC
0.2 VCC
• Clock application conditions
Using a crystal oscillator
or
ceramic oscillator
X0
X1
FCH
C1
C2
Using an external clock
signal
X0 X1
Open
FCH
41
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