Datasheet

iii
ATtiny2313/V
2543F–AVR–08/04
Universal Serial Interface – USI...................................................... 137
Overview........................................................................................................... 137
Functional Descriptions .................................................................................... 138
Alternative USI Usage ...................................................................................... 143
USI Register Descriptions................................................................................. 143
Analog Comparator ......................................................................... 148
debugWIRE On-chip Debug System .............................................. 150
Features............................................................................................................ 150
Overview........................................................................................................... 150
Physical Interface ............................................................................................. 150
Software Break Points ...................................................................................... 151
Limitations of debugWIRE ................................................................................ 151
debugWIRE Related Register in I/O Memory ................................................... 151
Self-Programming the Flash........................................................... 152
Addressing the Flash During Self-Programming .............................................. 153
Memory Programming..................................................................... 157
Program And Data Memory Lock Bits .............................................................. 157
Fuse Bits........................................................................................................... 158
Signature Bytes ................................................................................................ 159
Calibration Byte ................................................................................................ 159
Page Size ......................................................................................................... 159
Parallel Programming Parameters, Pin Mapping, and Commands .................. 160
Serial Programming Pin Mapping ..................................................................... 162
Parallel Programming ....................................................................................... 162
Serial Downloading........................................................................................... 171
Electrical Characteristics................................................................ 176
Absolute Maximum Ratings*............................................................................. 176
DC Characteristics............................................................................................ 176
External Clock Drive Waveforms ...................................................................... 177
External Clock Drive ......................................................................................... 177
Maximum Speed vs. V
CC ........................................................................................................................ 178
ATtiny2313 Typical Characteristics ............................................... 179
Register Summary ........................................................................... 209
Instruction Set Summary ................................................................ 211
Ordering Information....................................................................... 213
Packaging Information .................................................................... 214