MB89490 View Datasheet(PDF) - Fujitsu
Part Name
Description
Manufacturer
MB89490 Datasheet PDF : 45 Pages
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MB89490 Series
(3) Clock Timing
Parameter
Clock frequency
Clock cycle time
Input clock pulse width
Input clock rising/falling time
Symbol
FCH
FCL
tHCYL
tLCYL
PWH
PWL
PWHL
PWLL
tCR
tCF
Pin
X0, X1
X0A, X1A
X0, X1
X0A, X1A
X0
X0A
X0, X0A
Min.
1
—
80
13.3
20
—
—
(AVSS = VSS = 0.0 V, TA = –40°C to +85°C)
Value
Unit
Typ. Max.
Remarks
—
12.5 MHz
32.768 75 kHz
— 1000 ns
30.5
—
µs
—
— ns
15.2
—
µs External clock
—
10 ns
X0 and X1 Timing and Conditions
PWH
tCR
tHCYL
PWL
tCF
0.8 VCC 0.8 VCC
X0
0.2 VCC
0.2 VCC
0.2 VCC
Main Clock Conditions
When a crystal
or
ceramic reasonator is used
X0
C1
X1
FCH
C2
When an external clock is used
X0
X1
Open
FCH
31
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