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ATMEGA64-16AI Datasheet(PDF) 40 Page - ATMEL Corporation |
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ATMEGA64-16AI Datasheet(HTML) 40 Page - ATMEL Corporation |
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40 / 393 page  40 ATmega64(L) 2490L–AVR–10/06 Table 8. For ceramic resonators, the capacitor values given by the manufacturer should be used. Figure 19. Crystal Oscillator Connections The Oscillator can operate in three different modes, each optimized for a specific fre- quency range. The operating mode is selected by the fuses CKSEL3..1 as shown in Table 8. Note: 1. This option should not be used with crystals, only with ceramic resonators. The CKSEL0 Fuse together with the SUT1..0 Fuses select the start-up times as shown in Table 9. Table 8. 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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