ATmega32U2 datasheet(312/314 Pages) ATMEL

312 / 314 page

7799B–AVR–07/09

ATmega8U2/16U2/32U2

Memory Programming ......................................................................... 246

25.1Program And Data Memory Lock Bits .................................................................246

25.2Fuse Bits ..............................................................................................................247

25.3Signature Bytes ...................................................................................................249

25.4Calibration Byte ...................................................................................................249

25.5Page Size ............................................................................................................249

25.6Parallel Programming Parameters, Pin Mapping, and Commands .....................250

25.7Parallel Programming ..........................................................................................252

25.8Serial Downloading ..............................................................................................259

25.9Serial Programming Pin Mapping ........................................................................259

Electrical Characteristics .................................................................... 264

26.1Absolute Maximum Ratings* ...............................................................................264

26.2DC Characteristics ...............................................................................................264

26.3Speed Grades .....................................................................................................266

26.4Clock Characteristics ...........................................................................................266

26.5System and Reset Characteristics ......................................................................267

26.6External Interrupts Characteristics ......................................................................269

26.7SPI Timing Characteristics ..................................................................................269

26.8Hardware Boot EntranceTiming Characteristics ..................................................270

26.9Parallel Programming Characteristics .................................................................271

Typical Characteristics ........................................................................ 273

27.1Active Supply Current ..........................................................................................273

27.2Idle Supply Current ..............................................................................................276

27.3Power-down Supply Current ................................................................................278

27.4Power-save Supply Current .................................................................................279

27.5Pin Pull-Up ...........................................................................................................280

27.6Pin Driver Strength ..............................................................................................281

27.7Pin Threshold and Hysteresis ..............................................................................285

27.8BOD Threshold ....................................................................................................287

27.9Internal Oscilllator Speed ....................................................................................289

27.10Current Consumption of Peripheral Units ..........................................................291

27.11Current Consumption in Reset and Reset Pulsewidth ......................................293

Instruction Set Summary ..................................................................... 298

ATmega32U2 Datasheet(PDF) 312 Page - ATMEL Corporation