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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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AT90USB646 Fiches technique(PDF) 45 Page - ATMEL Corporation |
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AT90USB646 Fiches technique(HTML) 45 Page - ATMEL Corporation |
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45 / 435 page  45 7593D–AVR–07/06 AT90USB64/128 the Reset Time-out. For more information on the pre-programmed calibration value, see the sec- tion “Calibration Byte” on page 371 Notes: 1. The device is shipped with this option selected. 2. The frequency ranges are preliminary values. Actual values are TBD. 3. If 8 MHz frequency exceeds the specification of the device (depends on VCC), the CKDIV8 Fuse can be programmed in order to divide the internal frequency by 8. When this Oscillator is selected, start-up times are determined by the SUT Fuses as shown in Table 6-5 on page 44. Table 6-7. Internal Calibrated RC Oscillator Operating Modes(1)(3) Frequency Range(2) (MHz) CKSEL3..0 7.3 - 8.1 0010 |
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