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ATmega16 数据表(PDF) 26 Page - ATMEL Corporation |
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ATmega16 数据表(HTML) 26 Page - ATMEL Corporation |
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26 / 357 page ![]() 26 2466S–AVR–05/09 ATmega16(L) choosing capacitors for use with crystals are given in Table 4. For ceramic resonators, the capacitor values given by the manufacturer should be used. Figure 12. Crystal Oscillator Connections The Oscillator can operate in three different modes, each optimized for a specific frequency range. The operating mode is selected by the fuses CKSEL3..1 as shown in Table 4. Note: 1. This option should not be used with crystals, only with ceramic resonators. Table 4. Crystal Oscillator Operating Modes CKOPT CKSEL3..1 Frequency Range (MHz) Recommended Range for Capacitors C1 and C2 for Use with Crystals (pF) 1 101(1) 0.4 - 0.9 – 1 110 0.9 - 3.0 12 - 22 1 111 3.0 - 8.0 12 - 22 0 101, 110, 111 1.0 ≤ 12 - 22 XTAL2 XTAL1 GND C2 C1 |
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