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HD6433644R Datasheet(PDF) 104 Page - Renesas Technology Corp

Part # HD6433644R
Description  8-Bit Single-Chip Microcomputer
PDF  549 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD6433644R Datasheet(HTML) 104 Page - Renesas Technology Corp

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Section 4 Clock Pulse Generators
Rev. 6.00 Sep 12, 2006 page 84 of 526
REJ09B0326-0600
External Clock Input Method: Connect an external clock signal to pin OSC1, and leave pin
OSC2 open. Figure 4.6 shows a typical connection.
1
2
OSC
OSC
External clock input
Open
Figure 4.6 External Clock Input (Example)
Frequency
Oscillator Clock (
φφφφOSC)
Duty cycle
45% to 55%
4.3
Subclock Generator
Connecting a 32.768-kHz Crystal Resonator: Clock pulses can be supplied to the subclock
divider by connecting a 32.768-kHz crystal resonator, as shown in figure 4.7. Follow the same
precautions as noted under section 4.2, Notes on Board Design.
X
X
C1
C2
1
2
C = C
= 15 pF (typ.)
12
Figure 4.7 Typical Connection to 32.768-kHz Crystal Resonator



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