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PIC18LC658-E/CL Datasheet(PDF) 22 Page - Microchip Technology |
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PIC18LC658-E/CL Datasheet(HTML) 22 Page - Microchip Technology |
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22 / 366 page  PIC18CXX8 DS30475A-page 22 Advanced Information 2000 Microchip Technology Inc. TABLE 2-1: CERAMIC RESONATORS TABLE 2-2: CAPACITOR SELECTION FOR CRYSTAL OSCILLATOR 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 20.0 MHz 25.0 MHz 10 - 68 pF 10 - 22 pF TBD TBD 10 - 68 pF 10 - 22 pF TBD TBD HS+PLL 4.0 MHz 8.0 MHz 10.0 MHz TBD 10 - 68 pF TBD TBD 10 - 68 pF TBD These values are for design guidance only. See notes on this 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. Osc Type Crystal Freq Cap. Range C1 Cap. Range C2 LP 32.0 kHz 33 pF 33 pF 200 kHz 15 pF 15 pF XT 200 kHz 47-68 pF 47-68 pF 1.0 MHz 15 pF 15 pF 4.0 MHz 15 pF 15 pF HS 4.0 MHz 15 pF 15 pF 8.0 MHz 15-33 pF 15-33 pF 20.0 MHz 15-33 pF 15-33 pF 25.0 MHz TBD TBD HS+PLL 4.0 MHz 15 pF 15 pF 8.0 MHz 15-33 pF 15-33 pF 10.0 MHz TBD TBD These values are for design guidance only. See notes on this page. Crystals Used 32.0 kHz Epson C-001R32.768K-A ± 20 PPM 200 kHz STD XTL 200.000KHz ± 20 PPM 1.0 MHz ECS ECS-10-13-1 ± 50 PPM 4.0 MHz ECS ECS-40-20-1 ± 50 PPM 8.0 MHz EPSON CA-301 8.000M-C ± 30 PPM 20.0 MHz EPSON CA-301 20.000M-C ± 30 PPM Note 1: Recommended values of C1 and C2 are identical to the ranges tested (Table 2-1). 2: Higher capacitance increases the stability of the oscillator, but also increases the start-up time. 3: Since each resonator/crystal has its own characteristics, the user should consult the resonator/crystal manufacturer for appropri- ate 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 specification. |
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