ATMEGA32U4_14 Datasheet, PDF (27/28 Pages) ATMEL Corporation – 8-bit Microcontroller with 16/32 Bytes of ISP Flash and USB Controller

11. Document Revision History
11.1 7618B 03/08
1. Removed references to DFU Functional Descriptor throughout the document.
11.2 7618C 07/08
1. Update for AT90USB162/82, AT90USB64x, ATmega32U4 and ATmega16U4.
2. Update bootloader revision history.
27
7618C–AVR–07/08