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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PIC16LC71 датащи(PDF) 50 Page - Microchip Technology |
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PIC16LC71 датащи(HTML) 50 Page - Microchip Technology |
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50 / 176 page  PIC16C71X DS30272A-page 50 © 1997 Microchip Technology Inc. TABLE 8-3: CERAMIC RESONATORS, PIC16C710/711/715 Ranges Tested: Mode Freq OSC1 OSC2 XT 455 kHz 2.0 MHz 4.0 MHz 68 - 100 pF 15 - 68 pF 15 - 68 pF 68 - 100 pF 15 - 68 pF 15 - 68 pF HS 8.0 MHz 16.0 MHz 10 - 68 pF 10 - 22 pF 10 - 68 pF 10 - 22 pF These values are for design guidance only. See notes at bottom of page. Resonators Used: 455 kHz Panasonic EFO-A455K04B ± 0.3% 2.0 MHz Murata Erie CSA2.00MG ± 0.5% 4.0 MHz Murata Erie CSA4.00MG ± 0.5% 8.0 MHz Murata Erie CSA8.00MT ± 0.5% 16.0 MHz Murata Erie CSA16.00MX ± 0.5% All resonators used did not have built-in capacitors. TABLE 8-4: CAPACITOR SELECTION FOR CRYSTAL OSCILLATOR, PIC16C710/711/715 Osc Type Crystal Freq Cap. Range C1 Cap. Range C2 LP 32 kHz 33 pF 33 pF 200 kHz 15 pF 15 pF XT 200 kHz 47-68 pF 47-68 pF 1 MHz 15 pF 15 pF 4 MHz 15 pF 15 pF HS 4 MHz 15 pF 15 pF 8 MHz 15-33 pF 15-33 pF 20 MHz 15-33 pF 15-33 pF These values are for design guidance only. See notes at bottom of page. Crystals Used 32 kHz Epson C-001R32.768K-A ± 20 PPM 200 kHz STD XTL 200.000KHz ± 20 PPM 1 MHz ECS ECS-10-13-1 ± 50 PPM 4 MHz ECS ECS-40-20-1 ± 50 PPM 8 MHz EPSON CA-301 8.000M-C ± 30 PPM 20 MHz EPSON CA-301 20.000M-C ± 30 PPM Note 1: Recommended values of C1 and C2 are identical to the ranges tested table. 2: Higher capacitance increases the stability of oscillator but also increases the start-up time. 3: Since each resonator/crystal has its own characteristics, the user should consult the resonator/crystal man- ufacturer for appropriate values of external components. 4: Rs may be required in HS mode as well as XT mode to avoid overdriving crystals with low drive level speci- fication. |
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