31.11 USB调节器............................................... .................................................. 421

31.12 BOD水平.....................................................................................................422

31.13看门狗定时器的频率.............................................. .............................. 423

31.14内部RC振荡器频率............................................. ....................... 424

31.15上电复位............................................. ................................................. 425

32

ATmega32U6典型特征............................................... 428

33注册摘要............................................... ................................ 429

34指令集摘要.............................................. ....................... 433

35订购信息............................................... ............................ 436

35.1 TQFP64 .............................................................................................................437

35.2 QFN64 ...............................................................................................................439

36勘误表..................................................................................................... 441

37 AT90USB1287 / 6勘误表。 .................................................. ..................... 441

37.1 AT90USB1287 / 6勘误历史............................................ ............................. 441

37.2 AT90USB1287 / 6首次发行............................................ ............................. 441

37.3 AT90USB1287 / 6第二版............................................ ........................ 444

37.4 AT90USB1287 / 6第三次发布............................................ ............................ 446

38 AT90USB647 / 6勘误表。 .................................................. ....................... 447

39 ATmega32U6勘误表。 .................................................. .......................... 448

40数据表修订历史的ATmega32U6 / AT90USB64 / 128 ....... 449

40.1变更从7593A到7593B ............................................ ............................. 449

从7593B 40.2变化为7593C ............................................ ............................. 449

从7593C 40.3变化为7593D ............................................ ............................. 449

从7593D 40.4变更7593E ............................................ ............................. 449

40.5变更的7593E到7593F ............................................ ............................. 449

40.6变更从7593F至7593G ............................................ ............................. 449

从7593G 40.7变化为7593H ............................................ ............................. 449

458

ATmega32U6/AT90USB64/128

7593H–AVR–11/08