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AT90USB646 Datasheet(PDF) 426 Page - ATMEL Corporation

Part # AT90USB646
Description  8-bit Microcontroller with 64/128K Bytes of ISP Flash and USB Controller
PDF  435 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT90USB646 Datasheet(HTML) 426 Page - ATMEL Corporation

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7593D–AVR–07/06
AT90USB64/128
35. Datasheet Revision History for AT90USB64/128
Please note that the referring page numbers in this section are referred to this document. The
referring revision in this section are referring to the document revision.
35.1
Changes from 7593A to 7593B
1.
Changed default configuration for fuse bytes and security byte.
2.
Suppression of timer 4,5 registers which does not exist.
Updated typical application schematics in USB section
35.2
Changes from 7593B to 7593C
1.
Update to package drawings, MQFP64 and TQFP64.
35.3
Changes from 7593C to 7593D
1.
For further product compatibility, changed USB PLL possible prescaler configurations.
Only 8MHz and 16MHz crystal frequencies allows USB operation (See Table 6-13 on
page 51).



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