Rev. 1.0, 09/02, page 472 of 568
Table 20.3 shows the input conditions for the external clock.
Table 20.3 External Clock Input Conditions
V
CC
= 5.0 V
±±±±
10%
Item Symbol
Min
Max
Unit
Test
Conditions
External clock input low
pulse width
t
EXL
20.8
ns
Figure
20.5
External clock input high
pulse width
t
EXH
20.8
ns
External clock rise time
t
EXr
5 ns
External clock fall time
t
EXf
5 ns
t
EXH
t
EXL
t
EXr
t
EXf
V
CC
0.5
EXTAL
Figure 20.5 External Clock Input Timing
Содержание H8S/2627
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