ATmega16U4 datasheet(405/408 Pages) ATMEL

405 / 408 page

405

7766D–AVR–01/09

ATmega16U4/ATmega32U4

21.10 Registers description ........................................................................................264

21.11 USB Software Operating modes ......................................................................266

USB Device Operating modes ............................................................ 267

22.1 Introduction .........................................................................................................267

22.2 Power-on and reset ............................................................................................267

22.3 Endpoint reset ....................................................................................................267

22.4 USB reset ...........................................................................................................268

22.5 Endpoint selection ..............................................................................................268

22.6 Endpoint activation .............................................................................................268

22.7 Address Setup ....................................................................................................269

22.8 Suspend, Wake-up and Resume ........................................................................270

22.9 Detach ................................................................................................................270

22.10 Remote Wake-up ..............................................................................................271

22.11 STALL request ..................................................................................................271

22.12 CONTROL endpoint management ...................................................................272

22.13 OUT endpoint management .............................................................................273

22.14 IN endpoint management .................................................................................275

22.15 Isochronous mode ............................................................................................276

22.16 Overflow ...........................................................................................................277

22.17 Interrupts ..........................................................................................................277

22.18 Registers ..........................................................................................................278

Analog Comparator .............................................................................. 290

23.1 Analog Comparator Multiplexed Input ................................................................292

Analog to Digital Converter - ADC ...................................................... 293

24.1 Features .............................................................................................................293

24.2 Operation ............................................................................................................295

24.3 Starting a Conversion .........................................................................................295

24.4 Prescaling and Conversion Timing .....................................................................296

24.5 Changing Channel or Reference Selection ........................................................299

24.6 Temperature Sensor ...........................................................................................300

24.7 ADC Noise Canceler ..........................................................................................301

24.8 ADC Conversion Result ......................................................................................306

24.9 ADC Register Description ...................................................................................308

JTAG Interface and On-chip Debug System ...................................... 315

25.1 Overview .............................................................................................................315

ATmega16U4 Datasheet(PDF) 405 Page - ATMEL Corporation