Datasheet

v
ATmega325/3250/645/6450
2570K–AVR–04/07
Absolute Maximum Ratings*............................................................................. 291
DC Characteristics............................................................................................ 291
External Clock Drive Waveforms ...................................................................... 293
External Clock Drive ......................................................................................... 293
Speed vs. V
CC ................................................................................................................................................ 293
SPI Timing Characteristics ............................................................................... 294
ADC Characteristics – Preliminary Data........................................................... 296
Calibrated Internal RC Oscillator Accuracy ...................................................... 297
Typical Characteristics – Preliminary Data .................................. 298
Register Summary ........................................................................... 328
Instruction Set Summary ................................................................ 332
Ordering Information....................................................................... 335
ATmega325 ...................................................................................................... 335
ATmega3250 .................................................................................................... 336
ATmega645 ...................................................................................................... 337
ATmega6450 .................................................................................................... 338
Packaging Information .................................................................... 339
64A ................................................................................................................... 339
64M1................................................................................................................. 340
100A ................................................................................................................. 341
Errata ................................................................................................ 342
ATmega325 Rev. C .......................................................................................... 342
ATmega325 Rev. B .......................................................................................... 342
ATmega325 Rev. A .......................................................................................... 342
ATmega3250 Rev. C ........................................................................................ 342
ATmega3250 Rev. B ........................................................................................ 342
ATmega3250 Rev. A ........................................................................................ 343
ATmega645 Rev. A .......................................................................................... 343
ATmega6450 Rev. A ........................................................................................ 343
Datasheet Revision History ............................................................ 344
Rev. 2570J – 11/06........................................................................................... 344
Rev. 2570I – 07/06 ........................................................................................... 344
Rev. 2570H – 06/06.......................................................................................... 344
Rev. 2570G – 04/06.......................................................................................... 344
Rev. 2570F – 03/06 .......................................................................................... 344
Rev. 2570E – 03/06 .......................................................................................... 344
Rev. 2570D – 05/05.......................................................................................... 345
Rev. 2570C – 11/04.......................................................................................... 345
Rev. 2570B – 09/04 .......................................................................................... 345