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H8S/2224 Scheda tecnica(PDF) 858 Page - Renesas Technology Corp

Il numero della parte H8S/2224
Spiegazioni elettronici  16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series
PDF  1071 Pages
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Produttore elettronici  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8S/2224 Scheda tecnica(HTML) 858 Page - Renesas Technology Corp

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Section 23 Clock Pulse Generator
Rev. 5.00 Aug 08, 2006 page 772 of 982
REJ09B0054-0500
EXTAL
XTAL
EXTAL
XTAL
External clock input
Open
External clock input
(a) XTAL pin left open
(b) Complementary clock input at XTAL pin
Figure 23.4 External Clock Input (Examples)
Table 23.3 shows the input conditions for the external clock. Table 23.4 shows the input
conditions for the external clock when duty adjustment circuit is not used.
Table 23.3 External Clock Input Conditions (1) (H8S/2258 Group)
VCC = 4.0 V to 5.5 V
Item
Symbol
Min
Max
Unit
Test Conditions
External clock input low
pulse width
tEXL
30
—
ns
External clock input high
pulse width
tEXH
30
—
ns
External clock rise time
tEXr
—7
ns
External clock fall time
tEXf
—7
ns
Figure 23.5
Clock low pulse width
tCL
0.4
0.6
tCYC
Clock high pulse width
tCH
0.4
0.6
tCYC
Figure 27.10



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