ATmega48PA/88PA/168PA/328P
25 Self-Programming the Flash, ATmega48PA ...................................... 269
25.1Overview .............................................................................................................269
25.2Addressing the Flash During Self-Programming .................................................270
25.3Register Description ............................................................................................275
26 Boot Loader Support – Read-While-Write Self-Programming,
ATmega88PA, ATmega168PA and ATmega328P 277
26.1Features ..............................................................................................................277
26.2Overview .............................................................................................................277
26.3Application and Boot Loader Flash Sections .......................................................277
26.4Read-While-Write and No Read-While-Write Flash Sections ..............................278
26.5Boot Loader Lock Bits .........................................................................................280
26.6Entering the Boot Loader Program ......................................................................281
26.7Addressing the Flash During Self-Programming .................................................282
26.8Self-Programming the Flash ................................................................................282
26.9Register Description ............................................................................................292
27 Memory Programming ......................................................................... 294
27.1Program And Data Memory Lock Bits .................................................................294
27.2Fuse Bits .............................................................................................................295
27.3Signature Bytes ...................................................................................................298
27.4Calibration Byte ...................................................................................................298
27.5Page Size ............................................................................................................299
27.6Parallel Programming Parameters, Pin Mapping, and Commands .....................299
27.7Parallel Programming ..........................................................................................301
27.8Serial Downloading .............................................................................................308
28 Electrical Characteristics .................................................................... 313
28.1Absolute Maximum Ratings* ...............................................................................313
28.2DC Characteristics ..............................................................................................313
28.3Speed Grades .....................................................................................................316
28.4Clock Characteristics ...........................................................................................317
28.5System and Reset Characteristics ......................................................................318
28.6SPI Timing Characteristics ..................................................................................319
28.72-wire Serial Interface Characteristics .................................................................321
28.8ADC Characteristics ............................................................................................323
28.9Parallel Programming Characteristics .................................................................324
29 Typical Characteristics ........................................................................ 326
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