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AT90USB646 датащи(PDF) 44 Page - ATMEL Corporation

номер детали AT90USB646
подробное описание детали  Microcontroller with 64/128K Bytes of ISP Flash and USB Controller
PDF  434 Pages
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производитель  ATMEL [ATMEL Corporation]
домашняя страница  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT90USB646 датащи(HTML) 44 Page - ATMEL Corporation

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44
7593A–AVR–02/06
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 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 6-5 on page 43.
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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