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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HD404618TF датащи(PDF) 38 Page - Renesas Technology Corp |
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HD404618TF датащи(HTML) 38 Page - Renesas Technology Corp |
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38 / 91 page  HD404618 Series 36 Table 18 Oscillator Circuit Examples Circuit Configuration Circuit Constants External clock operation (OSC 1, OSC 2) External oscillator OSC Open 1 OSC 2 Ceramic oscillator (OSC 1, OSC 2) OSC 2 C1 2 C OSC 1 Rf Ceramic GND Ceramic oscillator: CSB400P22, CSB400P (Murata) R f = 1 MΩ ± 20% C 1 = C2 = 220 pF ± 5% Ceramic oscillator: CSB800J122, CSB800J(Murata) R f = 1 MΩ ± 20% C 1 = C2 = 220 pF ± 5% Crystal oscillator X1 C1 2 C X2 Crystal GND L S C RS C 0 Crystal: 32.768 kHz: MX38T (Nippon Denpa Kogyo) R s = 14 kΩ C 0 = 1.5 pF C 1 = 20 pF ± 20% C 2 = 20 pF ± 20% Notes: 1. The circuit constants given above are recommended values provided by the oscillator manufacturer. Since they may be affected by stray capacitances from the oscillator or board, consult the crystal or ceramic oscillator manufacturer to determine the actual circuit parameters required. 2. Wiring between the OSC 1/OSC2 pins (X1, X2 pins) and other elements must be as short as possible, and must not cross other wiring. Refer to the recommended layout of the crystal and ceramic oscillator in figure 22. 3. If a 32.768-kHz crystal oscillator is not used, fix the X1 pin to V CC and leave the X2 pin open. |
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