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HD6433644R Datasheet(PDF) 102 Page - Renesas Technology Corp |
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HD6433644R Datasheet(HTML) 102 Page - Renesas Technology Corp |
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102 / 549 page  Section 4 Clock Pulse Generators Rev. 6.00 Sep 12, 2006 page 82 of 526 REJ09B0326-0600 4.2 System Clock Generator Clock pulses can be supplied to the system clock divider either by connecting a crystal or ceramic resonator, or by providing external clock input. Connecting a Crystal Resonator: Figure 4.2 shows a typical method of connecting a crystal resonator. 1 2 C1 C2 OSC OSC R = 1 M ±20% C = C = 12 pF ±20% f 12 Ω Rf Figure 4.2 Typical Connection to Crystal Resonator Figure 4.3 shows the equivalent circuit of a crystal resonator. An oscillator having the characteristics given in table 4.1 should be used. CS C0 RS OSC1 OSC2 LS Figure 4.3 Equivalent Circuit of Crystal Resonator Table 4.1 Crystal Resonator Parameters Frequency 2 MHz 4 MHz 8 MHz 10 MHz RS (max) 500 Ω 100 Ω 50 Ω 30 Ω C0 (max) 7 pF 7 pF 7 pF 7 pF |
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