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ATmega32U2 Datasheet(PDF) 34 Page - ATMEL Corporation |
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ATmega32U2 Datasheet(HTML) 34 Page - ATMEL Corporation |
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34 / 314 page  34 7799B–AVR–07/09 ATmega8U2/16U2/32U2 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 V CC), 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 8-5 on page 31. Note: 1. The device is shipped with this option selected. Table 8-7. Start-up times for the internal calibrated RC Oscillator clock selection Power Conditions Start-up Time from Power- down and Power-save Additional Delay from Reset (VCC = 5.0V) SUT1..0 BOD enabled 6 CK 14 CK 00 Fast rising power 6 CK 14 CK + 4.1 ms 01 Slowly rising power 6 CK 14 CK + 65 ms(1) 10 Reserved 11 |
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