HD6432633 Datasheet, PDF (1032/1453 Pages) Renesas Technology Corp – Series of Microcomputers (MCUs: microcomputer units)

External Clock
Table 23B-4 and figure 23B-7 show the input conditions for the external clock.
Table 23B-4 External Clock Input Conditions
Item
External clock input low
pulse width
External clock input high
pulse width
External clock rise time
External clock fall time
Clock low pulse
width level
Clock high pulse width
level
Symbol
t _EXL
t _EXH
t _EXr
t _EXf
t _CL
t _CH
PV_CC = 5.0 V ±10%
Min
Max
15
—
15
—
—
5
—
5
0.4
0.6
80
—
0.4
0.6
80
—
Unit
ns
ns
ns
ns
t _cyc
ns
t _cyc
ns
Test Conditions
Figure 23B-7
ø ≥ 5 MHz
ø < 5 MHz
ø ≥ 5 MHz
ø < 5 MHz
Figure 26-2,
figure 27-2
EXTAL
t_EXH
t_EXL
V_CC × 0.5
t_EXr
t_EXf
Figure 23B-7 External Clock Input Timing
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