Hitachi H8/3152, Hardware Manual

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115
12.2.6 AC Characteristics (3 V, CPU operates at half of the external clock frequency)
Conditions: V
CC
= 2.7 to 3.3 V, V
SS
= 0 V, T
a
= –25 to +85
°
C, unless otherwise specified.
Item Symbol Min Typ Max Unit Test Conditions
Clock cycle time H8/3153 t
cyc
0.25 — 1.0
µ
s Figure 12.5
Except
H8/3153 t
cyc
0.2 — 1.0
Clock high width t
CH
0.4 — 0.6 t
cyc
Figure 12.5
Clock low width t
CL
0.4 — 0.6
Clock fall time t
Cf
— — 0.09 *
Clock rise time t
Cr
— — 0.09 *
I/O port input fall time t
f
— — 1.0
µ
s Figure 12.6
I/O port input rise time t
r
— — 1.0
RES pulse width t
RWL
20 — — t
cyc
Figure 12.7
Power-on time t
on
0 — — ms Figure 12.7
Power-off time t
off
0 — — ms Figure 12.7
EEPROM write time t
EPW
— — 10 ms Rewrite
— — 5 ms Erase, overwrite
Clock hold time t
CLKH
20 — — t
cyc
Figure 12.8
Clock setup time t
CLKS
20 — — t
cyc
Figure 12.8
Interrupt pulse width (
IRQ
) t
IRQW
400 — — ns Figure 12.8
Note: * It is assumed that there is no noise on the CLK pin, and the rise and fall of CLK are
straightforward.