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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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H838532H датащи(PDF) 109 Page - Renesas Technology Corp |
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H838532H датащи(HTML) 109 Page - Renesas Technology Corp |
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109 / 508 page  Section 4 Clock Pulse Generators Rev. 1.00 May 30, 2008 Page 89 of 484 REJ09B0436-0100 4.3 Subclock Generator (1) Connecting a 32.768 kHz/38.4 kHz Crystal Oscillator Clock pulses can be supplied to the subclock divider by connecting a 32.768 kHz/38.4 kHz crystal oscillator, as shown in figure 4.6. Follow the same precautions as noted under 3. notes on board design for the system clock in 4.2. X X C1 C2 1 2 C = C = 15 pF (typ.) 12 Note: Circuit constants should be determined in consultation with the resonator manufacturer. 32.768 kHz Nihon Denpa Kogyo MX73P 38.4 kHz VTC-200 Seiko Instrument Inc. Oscillation frequency Manufacturer Products Name Figure 4.6 Typical Connection to 32.768 kHz/38.4 kHz Crystal Oscillator (Subclock) Figure 4.7 shows the equivalent circuit of the 32.768 kHz/38.4 kHz crystal oscillator. CS C0 LRS X1 X2 C = 1.5 pF typ R = 14 k typ f = 32.768 kHz/38.4kHz 0 S W Ω S Figure 4.7 Equivalent Circuit of 32.768 kHz/38.4 kHz Crystal Oscillator |
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