Datasheet

iv
8197C–AVR–05/11
ATtiny261A/461A/861A
16.4 Software Break Points ...................................................................................162
16.5 Limitations of debugWIRE .............................................................................162
16.6 Register Description ......................................................................................162
17 Self-Programming the Flash ............................................................... 163
17.1 Performing Page Erase by SPM ....................................................................163
17.2 Filling the Temporary Buffer (Page Loading) .................................................163
17.3 Performing a Page Write ...............................................................................164
17.4 Addressing the Flash During Self-Programming ...........................................164
17.5 EEPROM Write Prevents Writing to SPMCSR ..............................................165
17.6 Reading Fuse and Lock Bits from Software ..................................................165
17.7 Preventing Flash Corruption ..........................................................................166
17.8 Programming Time for Flash when Using SPM ............................................166
17.9 Register Description ......................................................................................167
18 Memory Programming ......................................................................... 168
18.1 Program And Data Memory Lock Bits ...........................................................168
18.2 Fuse Bytes .....................................................................................................169
18.3 Signature Bytes .............................................................................................170
18.4 Calibration Byte .............................................................................................170
18.5 Page Size ......................................................................................................171
18.6 Serial Programming .......................................................................................171
18.7 Parallel Programming ....................................................................................175
19 Electrical Characteristics .................................................................... 185
19.1 Absolute Maximum Ratings* .........................................................................185
19.2 DC Characteristics .........................................................................................185
19.3 Speed ............................................................................................................187
19.4 Clock Characteristics .....................................................................................187
19.5 System and Reset Characteristics ................................................................188
19.6 ADC Characteristics ......................................................................................190
19.7 Analog Comparator Characteristics ...............................................................193
19.8 Serial Programming Characteristics ..............................................................193
19.9 Parallel Programming Characteristics ...........................................................194
20 Typical Characteristics ........................................................................ 197
20.1 Supply Current of I/O modules ......................................................................197
20.2 ATtiny261A ....................................................................................................199
20.3 ATtiny461A ....................................................................................................225