MB89160/160A Series
(3) Clock Timing
(VSS = 0.0 V, TA = –40°C to +85°C)
Value
Parameter
Symbol
FCH
Pin
X0, X1
Unit
Remarks
Min.
1
Typ.
—
Max.
4.2
MHz Main clock
kHz Subclock
Clock frequency
FCL
X0A, X1A
X0, X1
—
32.768
—
—
tHCYL
tLCYL
238
—
1000
—
ns
Main clock
Subclock
Clock cycle time
X0A, X1A
30.5
µs
PWH
PWL
Input clock pulse width
X0
X0
20
—
—
—
—
ns
ns
External clock
Input clock rising/falling
time
tCR
tCF
24
Main Clock Timing and Conditions
t
HCYL
0.8 VCC
0.2 VCC
X0
PWH
PWL
t
CR
t
CF
Main Clock Conditions
When a crystal
or
ceramic resonator is used
When the CR
oscillation option is used
When an external clock is used
X0
X1
X0
X1
X0
X1
Open
FCH
C1
FCH
FCH
R
C0
C
37
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