h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 1008

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 22B Clock Pulse Generator (H8S/2639 Group, H8S/2635 Group)
External Clock
Table 22B-4 and figure 22B-7 show the input conditions for the external clock.
Table 22B-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
Rev. 6.00 Feb 22, 2005 page 948 of 1484
REJ09B0103-0600
EXTAL
t
EXr
Figure 22B-7 External Clock Input Timing
Symbol
t
t
t
t
EXL
EXH
EXr
EXf
Min.
50
50
—
—
t
EXH
V
CC
= 5.0 V ±10%
Max.
—
—
5
5
t
EXf
t
EXL
Unit
ns
ns
ns
ns
Test Conditions
Figure 22B-7
V
CC
´
0.5