Table of Contents
Advertisement
15.2.3
AC Characteristics
Table 15.4 shows the control signal timing, and tables 15.5 and 15.6 show the serial interface
timing, of the H8/3855, H8/3856, and H8/3857.
Table 15.4 Control Signal Timing of H8/3855, H8/3856, and H8/3857
V
= 3.0 V to 5.5 V, AV
CC
including subactive mode, unless otherwise specified.
Item
Symbol Pins
System clock
f
OSC
oscillation frequency
OSC clock (φ
)
t
OSC
OSC
cycle time
System clock (φ)
t
cyc
cycle time
Subclock oscillation
f
W
frequency
Watch clock (φ
)
t
W
W
cycle time
Subclock (φ
)
t
SUB
subcyc
cycle time
Instruction cycle time
Oscillation
t
rc
stabilization time
(crystal oscillator)
Oscillation
t
rc
stabilization time
External clock high
t
CPH
width
External clock low
t
CPL
width
External clock rise
t
CPr
time
External clock fall
t
CPf
time
= 3.0 V to 5.5 V, V
CC
Applicable
Test Conditions
OSC1, OSC2
V
= 4.0 V to 5.5 V 2.0
CC
OSC1, OSC2
V
= 4.0 V to 5.5 V 100.0
CC
X1, X2
X1, X2
OSC
, OSC
V
= 4.0 V to 5.5 V 40.0
1
2
CC
X
, X
1
2
OSC
V
= 4.0 V to 5.5 V 40.0
1
CC
OSC
V
= 4.0 V to 5.5 V 40.0
1
CC
= 4.0 V to 5.5 V ⎯
OSC
V
1
CC
= 4.0 V to 5.5 V ⎯
OSC
V
1
CC
15. Electrical Characteristics (H8/3857 Group)
= AV
= 0.0 V, T
SS
SS
a
Min
2.0
200.0
2
⎯
⎯
⎯
2
2
60.0
2
80.0
80.0
⎯
⎯
Rev.3.00 Jul. 19, 2007 page 411 of 532
3
= –20°C to +75°C*
,
Values
Reference
Typ
Max
Unit Figure
⎯
MHz
10.0
⎯
5.0
⎯
1000.0
ns
*
⎯
Figure 15.1
1000.0
⎯
16
t
*
OSC
⎯
2000.0
ns
32.768 ⎯
kHz
⎯
μs
30.5
⎯
8
t
*
W
⎯
⎯
t
cyc
t
subcyc
⎯
⎯
ms
⎯
⎯
⎯
⎯
s
⎯
⎯
ns
Figure 15.1
⎯
⎯
⎯
⎯
ns
Figure 15.1
⎯
⎯
⎯
15.0
ns
Figure 15.1
⎯
20.0
⎯
15.0
ns
Figure 15.1
⎯
20.0
REJ09B0397-0300
1
1
2
Advertisement
Table of Contents
