342
7810C–AVR–10/12
Atmel ATmega328P [Preliminary]
25.2
Addressing the Flash During Self-Programming ...........................................264
25.3
Register Description’ .....................................................................................269
26
Boot Loader Support – Read-While-Write Self-Programming ......... 271
26.1
Features ........................................................................................................271
26.2
Overview ........................................................................................................271
26.3
Application and Boot Loader Flash Sections .................................................271
26.4
Read-While-Write and No Read-While-Write Flash Sections ........................272
26.5
Boot Loader Lock Bits ...................................................................................274
26.6
Entering the Boot Loader Program ................................................................275
26.7
Addressing the Flash During Self-Programming ...........................................276
26.8
Self-Programming the Flash ..........................................................................277
26.9
Register Description ......................................................................................284
27
Memory Programming ......................................................................... 286
27.1
Program And Data Memory Lock Bits ...........................................................286
27.2
Fuse Bits ........................................................................................................287
27.3
Signature Bytes .............................................................................................289
27.4
Calibration Byte .............................................................................................289
27.5
Page Size ......................................................................................................290
27.6
Parallel Programming Parameters, Pin Mapping, and Commands ...............290
27.7
Parallel Programming ....................................................................................292
27.8
Serial Downloading ........................................................................................299
28
Electrical Characteristics .................................................................... 304
28.1
Absolute Maximum Ratings* .........................................................................304
28.2
DC Characteristics. ........................................................................................305
28.3
DC Characteristics .........................................................................................306
28.4
Speed Grades ...............................................................................................306
28.5
Clock Characteristics .....................................................................................307
28.6
System and Reset Characteristics ................................................................308
28.7
SPI Timing Characteristics ............................................................................309
28.8
2-wire Serial Interface Characteristics ...........................................................311
28.9
ADC Characteristics .....................................................................................312
28.10
Parallel Programming Characteristics ...........................................................312
29
Typical Characteristics ........................................................................ 315
29.1
ATmega328P Typical Characteristics ...........................................................316