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Section 4 Clock Pulse Generators
Rev. 6.00 Aug 04, 2006 page 121 of 680
REJ09B0145-0600
Avoid running signal lines close to the oscillator circuit, since the oscillator may be adversely
affected by induction currents. (See figure 4.4.)
The board should be designed so that the oscillator and load capacitors are located as close as
possible to pins OSC
1
and OSC
2
.
OSC
OSC
C
1
C
2
Signal A
Signal B
2
1
To be avoided
Figure 4.4 Board Design of Oscillator Circuit
4. External Clock Input Method
Connect an external clock signal to pin OSC
1
, and leave pin OSC
2
open. Figure 4.5 shows a
typical connection.
1
2
OSC
OSC
External clock input
Open
Figure 4.5 External Clock Input (Example)
Frequency
Oscillator Clock (
φφφφ
OSC
)
Duty cycle
45% to 55%
Note: The circuit parameters above are recommended by the crystal or ceramic oscillator
manufacturer.
Содержание H8/38342
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Страница 76: ...Section 1 Overview Rev 6 00 Aug 04 2006 page 38 of 680 REJ09B0145 0600...
Страница 240: ...Section 7 RAM Rev 6 00 Aug 04 2006 page 202 of 680 REJ09B0145 0600...
Страница 468: ...Section 12 A D Converter Rev 6 00 Aug 04 2006 page 430 of 680 REJ09B0145 0600...
Страница 580: ...Section 15 Electrical Characteristics Rev 6 00 Aug 04 2006 page 542 of 680 REJ09B0145 0600...