Datasheet

Section 16 Electrical Characteristics
Rev. 8.00 Mar. 09, 2010 Page 495 of 658
REJ09B0042-0800
16.6.3 AC Characteristics
Table 16.17 lists the control signal timing, and tables 16.10 lists the serial interface timing of the
H8/38024S.
Table 16.17 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
Values
Item Symbol
Applicable
Pins
Min Typ Max Unit Test Condition
Reference
Figure
System clock
oscillation
frequency
f
OSC
OSC
1
, OSC
2
2.0 — 10.0 MHz V
CC
= 2.7 V to 3.6 V
2.0 — 4.0 MHz V
CC
= 1.8 V to 3.6 V
OSC clock (φ
OSC
)
cycle time
t
OSC
OSC
1
, OSC
2
100 — 500
(1000)
ns V
CC
= 2.7 V to 3.6 V Figure 16.2
*
2
250 — 500
(1000)
ns V
CC
= 1.8 V to 3.6 V
t
cyc
2 — 128 t
OSC
System clock (φ)
cycle time
— — 128 µs
Subclock oscillation
frequency
f
W
X
1
, X
2
— 32.768
or 38.4
— kHz
Watch clock (φ
W
)
cycle time
t
W
X
1
, X
2
— 30.5 or
26.0
— µs Figure 16.2
Subclock (φ
SUB
)
cycle time
t
subcyc
2 — 8 t
W
*
1
Instruction cycle
time
2 — — t
cyc
t
subcyc