365
15.2.3
AC Characteristics
Table 15.3 lists the control signal timing, and tables 15.4 lists the serial interface timing of the
H8/3864.
Table 15.3
Control Signal Timing
V
CC
= 1.8 V to 5.5 V, AV
CC
= 1.8 V to 5.5 V, V
SS
= AV
SS
= 0.0 V, T
a
= –20
°
C to +75
°
C
(including subactive mode) unless otherwise indicated.
Applicable
Values
Reference
Item
Symbol Pins
Min
Typ
Max
Unit
Test Condition
Figure
System clock
f
OSC
OSC
1
, OSC
2
2
—
16
MHz
V
CC
= 4.5 V to 5.5 V
*
2
oscillation
2
—
10
V
CC
= 2.7 V to 5.5 V
frequency
2
—
4
V
CC
= 1.8 V to 5.5 V
OSC clock (ø
OSC
)
cycle time
t
OSC
OSC
1
, OSC
2
62.5 —
500
(1000)
ns
V
CC
= 4.5 V to 5.5 V Figure 15.1
*
2
*
3
100
—
500
(1000)
V
CC
= 2.7 V to 5.5 V Figure 15.1
250
—
500
(1000)
V
CC
= 1.8 V to 5.5 V
*
3
System clock (ø)
t
cyc
2
—
128
t
OSC
cycle time
—
—
244.1
µ
s
Subclock oscillation
frequency
f
W
X
1
, X
2
—
32.768
or 38.4
—
kHz
Watch clock (ø
W
)
cycle time
t
W
X
1
, X
2
—
30.5 or
26.0
—
µ
s
Figure 15.1
Subclock (ø
SUB
)
cycle time
t
subcyc
2
—
8
t
W
*
1
Instruction cycle
time
2
—
—
t
cyc
t
subcyc
Oscillation
stabilization time
t
rc
OSC
1
, OSC
2
—
20
45
µ
s
Figure 15.9
V
CC
= 2.2 V to 5.5 V
Figure 15.9
*
2
—
0.1
8
ms
Figure 15.9
V
CC
= 2.2 V to 5.5 V
Figure 15.9
—
—
50
ms
Except the above