Ac Characteristics - Hitachi H8/3008 Hardware Manual

19.3

AC Characteristics

Clock timing parameters are listed in table 19.4, control signal timing parameters in table 19.5,
and bus timing parameters in table 19.6. Timing parameters of the on-chip supporting modules are
listed in table 19.7.
Table 19.4 Clock Timing
Condition: T = –20°C to +75°C (regular specifications), T
a
specifications)
Condition A: V = 2.7 to 5.5 V, AV
CC
Condition B: V = 3.0 to 5.5 V, AV
CC
Condition C: V = 5.0 V ± 10%, AV
CC
Item
Clock cycle time
Clock pulse low
width
Clock pulse high
width
Clock rise time
Clock fall time
Clock oscillator
settling time at
reset
Clock oscillator
settling time in
software standby
462
CC
CC
CC
A
Symbol Min Max
t 100 1000
cyc
t 30 —
CL
t 30 —
CH
t — 20
Cr
t — 20
Cf
t 20 —
OSC1
t 7 —
OSC2
= 2.7 to 5.5 V, V
REF
= 3.0 to 5.5 V, V
REF
= 5.0 V ± 10%, V
REF
Condition
B
Min Max
76.9 1000
18 —
18 —
— 15
— 15
20 —
7 —
= –40°C to +85°C (wide-range
a
= 2.7 to AV , V = AV
CC SS
= 3.0 to AV , V = AV
CC SS
= 4.5 to AV , V
CC SS
C
Min Max Unit Conditions
50 1000 ns
15 — ns
15 — ns
— 10 ns
— 10 ns
20 — ms
7 — ms
= 0 V
SS
= 0 V
SS
= AV = 0 V
SS
Test
Figure 19.3
to
figure 19.15
Figure 19.3
Figure 18.1