HD6417750RF240V Datasheet, PDF (518/606 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 19 Clock Pulse Generator
Table 19.3 shows the input conditions for the external clock.
Table 19.3 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
Symbol
t
EXL
t_EXH
t_EXr
t_EXf
t_CL
Clock high pulse width t_CH
level
V_CC = 5.0 V ± 10%
Min
Max
Unit
15
—
ns
15
—
ns
—
5
ns
—
5
ns
0.4
0.6
t_cyc
80
—
ns
0.4
0.6
t_cyc
80
—
ns
Test Conditions
Figure 19.5
φ ≥ 5 MHz
φ < 5 MHz
φ ≥ 5 MHz
φ < 5 MHz
Figure 21.2
EXTAL
t_EXH
t_EXL
V_CC × 0.5
t_EXr
t_EXf
Figure 19.5 External Clock Input Timing
Rev. 7.00 Sep. 11, 2009 Page 482 of 566
REJ09B0211-0700