at90usb647-16au ATMEL Corporation, at90usb647-16au Datasheet - Page 29

• Manufacturer Part Number: at90usb647-16au
• Description: At90usb1286 8-bit Avr Microcontroller With 64/128k Bytes Of Isp Flash And Usb Controller
• Manufacturer: ATMEL Corporation

10. Datasheet Revision History for AT90USB64/128
10.1
10.2
10.3
10.4
10.5
10.6
7593GS–AVR–03/08
Changes from 7593A to 7593B
Changes from 7593B to 7593C
Changes from 7593C to 7593D
Changes from 7593D to 7593E
Changes from 7593E to 7593F
Changes from 7593F to 7593G
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.
1. Changed default configuration for fuse bytes and security byte.
2. Suppression of timer 4,5 registers which does not exist.
3. Updated typical application schematics in USB section
1. Update to package drawings, MQFP64 and TQFP64.
1. For further product compatibility, changed USB PLL possible prescaler configurations.
1. Updated PLL Prescaler table: configuration words are different between AT90USB64x
2. Cleaned up some bits from USB registers, and updated information about OTG timers,
3. Updated clock distribution tree diagram (USB prescaler source and configuration
4. Cleaned up register summary.
5. Suppressed PCINT23:8 that do not exist from External Interrupts.
6. Updated Electrical Characteristics.
7. Added Typical Characteristics.
8. Update Errata section.
1. Removed ’Preliminary’ from document status.
2. Clarification in Stand by mode concerning USB. See
1. Updated Errata section.
Only 8MHz and 16MHz crystal frequencies allows USB operation (See
page
and AT90USB128x to enable the PLL with a 16 MHz source.
remote wake-up, reset and connection timings.
register).
49).
“Standby Mode” on page
AT90USB64/128
Table 6-11 on
53.
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