Datasheet

vi
8023F–AVR–07/09
ATmega325P/3250P
24.9Register Description ............................................................................................269
25 Memory Programming ......................................................................... 271
25.1Program And Data Memory Lock Bits .................................................................271
25.2Fuse Bits .............................................................................................................272
25.3Signature Bytes ...................................................................................................274
25.4Calibration Byte ...................................................................................................274
25.5Parallel Programming Parameters, Pin Mapping, and Commands .....................274
25.6Parallel Programming ..........................................................................................276
25.7Serial Downloading .............................................................................................285
25.8Programming via the JTAG Interface ..................................................................291
26 Electrical Characteristics .................................................................... 304
26.1Absolute Maximum Ratings* ...............................................................................304
26.2DC Characteristics ..............................................................................................304
26.3Speed Grades .....................................................................................................306
26.4Clock Characterizations ......................................................................................307
26.5System and Reset Characterizations ..................................................................308
26.6Standard Power-on Reset ...................................................................................308
26.7Enhanced Power-on Reset .................................................................................308
26.8Brown-out Detection ............................................................................................309
26.9SPI Timing Characteristics ..................................................................................310
26.10ADC Characteristics – Preliminary Data ............................................................312
27 Typical Characteristics ....................................................................... 314
27.1Active Supply Current ..........................................................................................314
27.2Idle Supply Current ..............................................................................................316
27.3Supply Current of I/O modules ............................................................................318
27.4Power-down Supply Current ...............................................................................319
27.5Power-save Supply Current ................................................................................320
27.6Standby Supply Current ......................................................................................321
27.7Pin Pull-up ...........................................................................................................321
27.8Pin Driver Strength ..............................................................................................324
27.9Pin Threshold and Hysteresis .............................................................................330
27.10Internal Oscillator Speed ...................................................................................335
27.11Current Consumption of Peripheral Units ..........................................................337
27.12Current Consumption in Reset and Reset Pulswidth ........................................340
28 Register Summary ............................................................................... 342