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H8S/2225 数据表(PDF) 866 Page - Renesas Technology Corp |
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H8S/2225 数据表(HTML) 866 Page - Renesas Technology Corp |
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866 / 1071 page ![]() Section 23 Clock Pulse Generator Rev. 5.00 Aug 08, 2006 page 780 of 982 REJ09B0054-0500 23.7 Subclock Oscillator 23.7.1 Connecting 32.768-kHz Crystal Resonator To supply a clock to the subclock divider, connect a 32.768-kHz crystal resonator, as shown in figure 23.8. Figure 23.9 shows the equivalence circuit for a 32.768-kHz oscillator. OSC1 OSC2 C1 C2 C1 = C2 = 15 pF (typ) Note: CL1 and CL2 are reference values including the floating capacitance of the board. Figure 23.8 Connection Example of 32.768-kHz Quartz Oscillator OSC1 OSC2 Cs Ls Rs Co Co = 1.5 pF (typ) Rs = 14 k Ω (typ) fw = 32.768 kHz Type name = C001R (SEIKO EPSON) Figure 23.9 Equivalence Circuit for 32.768-kHz Oscillator |
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