ATMEGA48-15AZV データシートの表示（PDF） - Atmel Corporation

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ATMEGA48-15AZV

8-bit Microcontroller with 8K Bytes In-System Programmable Flash

Atmel Corporation 

7530J–AVR–03/12

Atmel ATmega48/88/168 Automotive

22.5 Limitations of debugWIRE .............................................................................255

22.6 debugWIRE Related Register in I/O Memory ................................................255

23 Self-Programming the Flash, ATmega48 ........................................... 256

23.1 Addressing the Flash During Self-Programming ...........................................257

24 Boot Loader Support – Read-While-Write Self-Programming,

ATmega88 and ATmega168 ................................................................ 263

24.1 Boot Loader Features ....................................................................................263

24.2 Application and Boot Loader Flash Sections .................................................263

24.3 Read-While-Write and No Read-While-Write Flash Sections ........................264

24.4 Boot Loader Lock Bits ...................................................................................266

24.5 Entering the Boot Loader Program ................................................................267

24.6 Addressing the Flash During Self-Programming ...........................................269

24.7 Self-Programming the Flash ..........................................................................270

25 Memory Programming ......................................................................... 278

25.1 Program And Data Memory Lock Bits ...........................................................278

25.2 Fuse Bits ........................................................................................................280

25.3 Signature Bytes .............................................................................................282

25.4 Calibration Byte .............................................................................................282

25.5 Parallel Programming Parameters, Pin Mapping, and Commands ...............282

25.6 Serial Programming Pin Mapping ..................................................................285

25.7 Parallel Programming ....................................................................................285

25.8 Serial Downloading ........................................................................................293

26 Electrical Characteristics .................................................................... 298

26.1 Absolute Maximum Ratings* .........................................................................298

26.2 DC Characteristics .........................................................................................298

26.3 External Clock Drive Waveforms ...................................................................300

26.4 External Clock Drive ......................................................................................300

26.5 Maximum Speed vs. VCC ...............................................................................301

26.6 LIN Re-synchronization algorithm .................................................................301

26.7 Synchronization Algorithm .............................................................................301

26.8 Precaution Against OSCCAL Discontinuity ...................................................302

27 2-wire Serial Interface Characteristics ............................................... 303

27.1 SPI Timing Characteristics ............................................................................305

27.2 ADC Characteristics .....................................................................................306

337

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