Datasheet

 2018 Microchip Technology Inc. Data Sheet Complete DS40002061A-page 8
ATmega48A/PA/88A/PA/168A/PA/328/P
26.2 Addressing the Flash During Self-Programming ........................................... 265
26.3 Register Description ...................................................................................... 270
27 Boot Loader Support – Read-While-Write Self-Programming ............... 272
27.1 Features ........................................................................................................ 272
27.2 Overview........................................................................................................ 272
27.3 Application and Boot Loader Flash Sections................................................. 272
27.4 Read-While-Write and No Read-While-Write Flash Sections........................ 273
27.5 Boot Loader Lock Bits ................................................................................... 275
27.6 Entering the Boot Loader Program................................................................ 276
27.7 Addressing the Flash During Self-Programming ........................................... 277
27.8 Self-Programming the Flash.......................................................................... 278
27.9 Register Description ...................................................................................... 287
28 Memory Programming .................................................................................................... 289
28.1 Program And Data Memory Lock Bits ........................................................... 289
28.2 Fuse Bits........................................................................................................ 290
28.3 Signature Bytes ............................................................................................. 293
28.4 Calibration Byte ............................................................................................. 293
28.5 Page Size ...................................................................................................... 294
28.6 Parallel Programming Parameters, Pin Mapping, and Commands ............... 294
28.7 Parallel Programming .................................................................................... 296
28.8 Serial Downloading........................................................................................ 303
29 Electrical Characteristics – (TA = -40°C to 85°C) ........................................... 308
29.1 Absolute Maximum Ratings* ......................................................................... 308
29.2 DC Characteristics......................................................................................... 308
29.3 Speed Grades ............................................................................................... 312
29.4 Clock Characteristics..................................................................................... 313
29.5 System and Reset Characteristics ................................................................ 314
29.6 SPI Timing Characteristics ............................................................................ 315
29.7 Two-wire Serial Interface Characteristics ...................................................... 317
29.8 ADC Characteristics ...................................................................................... 319
29.9 Parallel Programming Characteristics ........................................................... 320
30 Electrical Characteristics (TA = -40°C to 105°C) ............................................ 322
30.1 Absolute Maximum Ratings* ......................................................................... 322
30.2 DC Characteristics......................................................................................... 322
31 Typical Characteristics – (TA = -40°C to 85°C) ................................................ 326