HD6432351 Datasheet, PDF (683/989 Pages) Renesas Technology Corp – The H8S/2000 CPU has an internal 32-bit architecture, is provided with sixteen 16-bit general registers and a concise

Table 19-4 External Clock Input Conditions
V_CC = 2.7 V V_CC = 5.0 V ±
to 5.5 V
10%
Item
Test
Symbol Min Max Min Max Unit Conditions
External clock input
t _EXL
low pulse width
40 — 20 — ns Figure 19-6
External clock input
t _EXH
high pulse width
40 — 20 — ns
External clock rise time t_EXr
External clock fall time t_EXf
Clock low pulse width t_CL
level
— 10 — 5 ns
— 10 — 5 ns
0.4 0.6 0.4 0.6 t_cyc
80 — 80 — ns
ø ≥ 5 MHz Figure 21-4
ø < 5 MHz
Clock high pulse width t_CH
level
0.4 0.6 0.4 0.6 t_cyc
80 — 80 — ns
ø ≥ 5 MHz
ø < 5 MHz
EXTAL
t_EXH
t_EXL
V_CC × 0.5
t_EXr
t_EXf
Figure 19-6 External Clock Input Timing
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