HD6432633 Datasheet, PDF (1020/1453 Pages) Renesas Technology Corp – Series of Microcomputers (MCUs: microcomputer units)

External Clock
Table 23A-4 and figure 23A-7 show the input conditions for the external clock.
Table 23A-4 External Clock Input Conditions
Item
Symbol
External clock input low t_EXL
pulse width
External clock input
t _EXH
high pulse width
External clock rise time t_EXr
External clock fall time t_EXf
Clock low pulse
t _CL
width level
Clock high pulse width t_CH
level
V_CC = 3.0 V
to 3.6 V,
PV_CC = 3.0 V
to 5.5 V
Min Max
20 —
20 —
— 10
— 10
0.4 0.6
80 —
0.4 0.6
80 —
V_CC = 3.0 V
to 3.6 V,
PV_CC = 5.0 V
±10%
Min Max
15 —
Unit
ns
Test Conditions
Figure 23A-7
15 — ns
—5
ns
—5
ns
0.4 0.6 t_cyc ø ≥ 5 MHz Figure
25-2
80 — ns ø < 5 MHz
0.4 0.6 t_cyc ø ≥ 5 MHz
80 — ns ø < 5 MHz
EXTAL
t_EXH
t_EXL
V_CC × 0.5
t_EXr
t_EXf
Figure 23A-7 External Clock Input Timing
966