398
13.2.3
AC Characteristics
Table 13-3 lists the control signal timing, and tables 13-4 list the serial interface timing of the
H8/3937 Series and 3937R Series.
Table 13-3 Control Signal Timing
V
CC
= 1.8 V to 3.6 V, AV
CC
= 1.8 V to 3.6 V, V
SS
= AV
SS
= 0.0 V, Ta = –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
—
10
MHz V
CC
= 2.7 V to 3.6 V
oscillation
frequency
2
—
4
V
CC
= 1.8 V to 3.6 V
OSC clock (ø
OSC
)
cycle time
t
OSC
OSC
1
, OSC
2
100
—
500
ns
V
CC
= 2.7 V to 3.6 V
Figure 13-1
250
—
500
V
CC
= 1.8 V to 3.6 V
System clock (ø) t
cyc
2
—
128
t
OSC
cycle time
—
—
208.3
µs
Subclock oscilla-
tion frequency
f
W
DX
1
, DX
2
—
76.8 or
160
—
kHz
Watch clock (ø
W
)
cycle time
t
W
DX
1
, DX
2
—
26.0 or
12.5
—
µs
Figure 13-1
Subclock (ø
SUB
)
cycle time
t
subcyc
2
—
8
t
W
*
Instruction cycle
time
2
—
—
t
cyc
t
subcyc
Oscillation
stabilization time
t
rc
OSC
1
, OSC
2
—
20
45
µs
V
CC
= 2.2 V to 3.6 V (In
case of Figure 13-8)
Figure 13-8
—
—
50
ms
Figure 13-8
DX
1
, DX
2
—
—
2.0
s
External clock
t
CPH
OSC
1
40
—
—
ns
V
CC
= 2.7 V to 3.6 V
Figure 13-1
high width
200
—
—
V
CC
= 1.8 V to 3.6 V
DX
1
—
6.51 or
3.125
—
µs
External clock
t
CPL
OSC
1
40
—
—
ns
V
CC
= 2.7 V to 3.6 V
Figure 13-1
low width
200
—
—
V
CC
= 1.8 V to 3.6 V
DX
1
—
6.51 or
3.125
—
µs
Содержание H8/3935
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