AT90USB646 datasheet(45/435 Pages) ATMEL

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AT90USB646 датащи(PDF) 45 Page - ATMEL Corporation

номер детали	AT90USB646

подробное описание детали	8-bit Microcontroller with 64/128K Bytes of ISP Flash and USB Controller

PDF	435 Pages

Scroll/Zoom	100%

производитель	ATMEL [ATMEL Corporation]

домашняя страница	http://www.atmel.com

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45 / 435 page

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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