Datasheet

iii
ATtiny2313
2543H–AVR–02/05
Examples of Baud Rate Setting........................................................................ 134
Universal Serial Interface – USI...................................................... 138
Overview........................................................................................................... 138
Functional Descriptions .................................................................................... 139
Alternative USI Usage ...................................................................................... 144
USI Register Descriptions................................................................................. 144
Analog Comparator ......................................................................... 149
debugWIRE On-chip Debug System .............................................. 151
Features............................................................................................................ 151
Overview........................................................................................................... 151
Physical Interface ............................................................................................. 151
Software Break Points ...................................................................................... 152
Limitations of debugWIRE ................................................................................ 152
debugWIRE Related Register in I/O Memory ................................................... 152
Self-Programming the Flash........................................................... 153
Addressing the Flash During Self-Programming .............................................. 154
Memory Programming..................................................................... 158
Program And Data Memory Lock Bits .............................................................. 158
Fuse Bits........................................................................................................... 159
Signature Bytes ................................................................................................ 160
Calibration Byte ................................................................................................ 160
Page Size ......................................................................................................... 160
Parallel Programming Parameters, Pin Mapping, and Commands .................. 161
Serial Programming Pin Mapping ..................................................................... 163
Parallel Programming ....................................................................................... 163
Serial Downloading........................................................................................... 172
Electrical Characteristics................................................................ 177
Absolute Maximum Ratings*............................................................................. 177
DC Characteristics............................................................................................ 177
External Clock Drive Waveforms ...................................................................... 178
External Clock Drive ......................................................................................... 178
Maximum Speed vs. V
CC ........................................................................................................................ 180
ATtiny2313 Typical Characteristics ............................................... 181
Register Summary ........................................................................... 211
Instruction Set Summary ................................................................ 213
Ordering Information....................................................................... 215