r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 1190
r4f2456
Manufacturer Part Number
r4f2456
Description
16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R4F2456.pdf
(1376 pages)
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Section 24 Clock Pulse Generator
Table 24.3 External Clock Input Conditions
Rev. 1.00 Sep. 19, 2008 Page 1160 of 1342
REJ09B0467-0100
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
Clock high pulse width
EXTAL
t
EXr
Figure 24.5 External Clock Input Timing
Symbol
t
t
t
t
t
t
EXL
EXH
EXr
EXf
CL
CH
t
EXH
V
Min
20
20
—
—
0.4
0.4
CC
= 3.0 V to 3.6 V
Max
—
—
5
5
0.6
0.6
t
EXf
t
EXL
Unit
ns
ns
ns
ns
t
t
cyc
cyc
V
CC
Test Conditions
Figure 24.5
× 0.5
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