ATMEGA16U4_1 Datasheet, PDF (405/408 Pages) ATMEL Corporation – 8-bit Microcontroller with 16/32K Bytes of ISP Flash and USB Controller

ATmega16U4/ATmega32U4
21.10 Registers description ........................................................................................264
21.11 USB Software Operating modes ......................................................................266
22 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
23 Analog Comparator .............................................................................. 290
23.1 Analog Comparator Multiplexed Input ................................................................292
24 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
25 JTAG Interface and On-chip Debug System ...................................... 315
25.1 Overview .............................................................................................................315
7766D–AVR–01/09
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