Figure 20.5 External Clock Input Timing; Table 20.3 External Clock Input Conditions - Hitachi H8S/2628 Hardware Manual

Table 20.3 shows the input conditions for the external clock.

Table 20.3 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
EXTAL
Rev. 1.0, 09/02, page 472 of 568
= 5.0 V ± ± ± ± 10%
V
CC
Symbol Min
t 20.8
EXL
t 20.8
EXH

t
EXr

t
EXf
t
EXH
t
EXr

Figure 20.5 External Clock Input Timing

Max Unit Test Conditions

ns Figure 20.5

ns
5 ns
5 ns
t
EXL
V
t
EXf
0.5
CC