ATMEGA16U4PRE Datasheet, PDF (423/433 Pages) ATMEL Corporation – Optional Boot Code Section with Independent Lock Bits

ATmega16U4/ATmega32U4
36. Datasheet Revision History for ATmega16U4/ATmega32U4
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.
36.1 Rev. 7766E – 04/10
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36.2 Rev. 7766D – 01/09
Updated “Features” on page 1.
Updated “Features” on page 253.
Updated Figure 21-9 on page 258.
Updated Section 21.8 on page 260.
Updated “Features” on page 292.
Updated “ATmega16U4/ATmega32U4 Boundary-scan Order” on page 327.
Updated Table 28-5 on page 348.
Updated “Electrical Characteristics” on page 378.
Updated Figure 29-2 on page 381.
Added “Typical Characteristics” on page 386.
Updated “Ordering Information” on page 415.
Updated “Errata” on page 419.
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36.3 Rev. 7766C – 11/08
Updated Memory section in “Features” on page 1.
Added section “Resources” on page 8.
Added section “Data Retention” on page 8.
Updated “Ordering Information” on page 415.
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36.4 Rev. 7766B – 11/08
Updated Memory section in “Features” on page 1.
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Added ATmega16U4 device.
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Created errata section and added ATmega16U4.
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Updated High Speed Timer, asynchronous description Section 15. on page 139
7766E–AVR–04/10
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