26.2Overview ..............................................................................................................268

26.3Application和引导装载程序Flash区........................................... ............ 268

26.4Read ，边写边和非同时读 - 写Flash区.............................. 269

26.5Boot程序锁定位............................................. ............................................ 271

26.6Entering引导装载程序............................................ .......................... 272

26.7Addressing闪存在自编程.......................................... ....... 273

26.8Self - Flash进行编程............................................ .................................... 274

26.9Register说明............................................... ............................................. 282

27存储器编程............................................... .......................... 284

27.1Program和数据存储器锁定位........................................... ...................... 284

27.2Fuse位..............................................................................................................285

27.3Signature字节...................................................................................................287

27.4Calibration字节...................................................................................................287

27.5Page尺寸............................................................................................................288

27.6Parallel编程参数，引脚映射及命令..................... 288

27.7Parallel程序............................................... ........................................... 290

27.8Serial下载............................................... ............................................... 297

28电气特性............................................... ..................... 302

28.1Absolute最大额定值* ............................................. .................................. 302

28.2DC特点............................................... ................................................ 302

28.3Speed等级.....................................................................................................304

28.4Clock特点............................................... ............................................ 305

28.5System和复位特性............................................. ......................... 306

28.62线串行接口特性............................................ ..................... 307

28.7SPI时序特性.............................................. .................................... 308

28.8ADC特点............................................... ............................................. 310

28.9Parallel编程特性.............................................. ................... 311

29典型特征............................................... ......................... 314

29.1Active电源电流.............................................. ............................................ 314

29.2Idle电源电流.............................................. ................................................ 317

的I / O模块29.3Supply当前.......................................... .................................. 320

29.4Power断电源电流............................................ ................................... 322

29.5Power ，节省电源电流............................................ .................................... 323

29.6Standby电源电流.............................................. ........................................ 323

29.7Pin拉...........................................................................................................324

vi

ATmega48/88/168

2545S–AVR–07/10