Datasheet

Section 22 Clock Pulse Generator
R01UH0310EJ0500 Rev. 5.00 Page 1137 of 1384
Sep 25, 2012
H8S/2426, H8S/2426R, H8S/2424 Group
Table 22.3 External Clock Input Conditions
V
CC
= 3.0 V to 3.6 V V
CC
= 4.5 V to 5.5 V
Item Symbol Min Max Min Max Unit
Test
Conditions
External clock input
low pulse width
t
EXL
20 ⎯ 20 ⎯ ns Figure 22.5
External clock input
high pulse width
t
EXH
20 ⎯ 20 ⎯ ns
External clock rise time t
EXr
⎯ 5 ⎯ 5 ns
External clock fall time t
EXf
⎯ 5 ⎯ 5 ns
Clock low pulse width t
CL
0.4 0.6 0.4 0.6 t
cyc
Clock high pulse width t
CH
0.4 0.6 0.4 0.6 t
cyc
t
EXH
t
EXL
t
EXr
t
EXf
V
CC
× 0.5
EXTAL
Figure 22.5 External Clock Input Timing