194
7598H–AVR–07/09
ATtiny25/45/85
19.2 Overview ........................................................................................................128
19.3 Physical Interface ..........................................................................................128
19.4 Software Break Points ...................................................................................129
19.5 Limitations of debugWIRE .............................................................................129
19.6 debugWIRE Related Register in I/O Memory ................................................129
20 Self-Programming the Flash ............................................................... 130
20.1 Performing Page Erase by SPM ....................................................................130
20.2 Filling the Temporary Buffer (Page Loading) .................................................130
20.3 Performing a Page Write ...............................................................................131
20.4 Addressing the Flash During Self-Programming ...........................................131
21 Memory Programming ......................................................................... 134
21.1 Program And Data Memory Lock Bits ...........................................................134
21.2 Fuse Bytes .....................................................................................................135
21.3 Signature Bytes .............................................................................................137
21.4 Calibration Byte .............................................................................................137
21.5 Page Size ......................................................................................................137
21.6 Serial Downloading ........................................................................................138
21.7 High-voltage Serial Programming ..................................................................142
21.8 High-voltage Serial Programming Algorithm Sequence ................................144
21.9 High-voltage Serial Programming Characteristics .........................................149
22 Electrical Characteristics .................................................................... 150
22.1 Absolute Maximum Ratings* .........................................................................150
22.2 External Clock Drive Waveforms ...................................................................151
22.3 External Clock Drive ......................................................................................152
22.4 ADC Characteristics – Preliminary Data ........................................................153
22.5 Calibrated RC Oscillator Accuracy ................................................................154
23 Typical Characteristics ........................................................................ 154
23.1 Active Supply Current ....................................................................................155
23.2 Idle Supply Current ........................................................................................157
23.3 Power-Down Supply Current .........................................................................161
23.4 Pin Pull-up .....................................................................................................162
23.5 Pin Driver Strength ........................................................................................165
23.6 Pin Thresholds and Hysteresis ......................................................................168
23.7 BOD Thresholds and Analog Comparator Offset ..........................................171
23.8 Internal Oscillator Speed ...............................................................................172
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