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HD64F36049 Datasheet(PDF) 104 Page - Renesas Technology Corp |
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HD64F36049 Datasheet(HTML) 104 Page - Renesas Technology Corp |
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104 / 562 page ![]() Section 5 Clock Pulse Generators Rev. 3.00 Mar. 15, 2006 Page 72 of 526 REJ09B0060-0300 5.2 Subclock Generator Figure 5.7 shows a block diagram of the subclock generator. Note: Resistance is a reference value. 2 1 X 8 M Ω X Figure 5.7 Block Diagram of Subclock Generator 5.2.1 Connecting 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 5.8. Figure 5.9 shows the equivalent circuit of the 32.768-kHz crystal resonator. X X C1 C2 1 2 C = C = 15 pF (typ.) 12 Figure 5.8 Typical Connection to 32.768-kHz Crystal Resonator X 1 X 2 L S C S C O C O = 1.5 pF (typ.) R S = 14 kΩ (typ.) fW = 32.768 kHz R S Note: Constants are reference values. Figure 5.9 Equivalent Circuit of 32.768-kHz Crystal Resonator |
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