Datasheet

iii
2586N–AVR–04/11
ATtiny25/45/85
13 8-bit Timer/Counter1 in ATtiny15 Mode ............................................... 98
13.1 Timer/Counter1 Prescaler ...............................................................................98
13.2 Counter and Compare Units ............................................................................98
13.3 Register Description ......................................................................................103
14 Dead Time Generator ........................................................................... 108
14.1 Register Description ......................................................................................109
15 USI – Universal Serial Interface .......................................................... 111
15.1 Features ........................................................................................................111
15.2 Overview ........................................................................................................111
15.3 Functional Descriptions .................................................................................112
15.4 Alternative USI Usage ...................................................................................117
15.5 Register Descriptions ....................................................................................118
16 Analog Comparator ............................................................................. 123
16.1 Analog Comparator Multiplexed Input ...........................................................123
16.2 Register Description ......................................................................................124
17 Analog to Digital Converter ................................................................ 126
17.1 Features ........................................................................................................126
17.2 Overview ........................................................................................................126
17.3 Operation .......................................................................................................127
17.4 Starting a Conversion ....................................................................................128
17.5 Prescaling and Conversion Timing ................................................................129
17.6 Changing Channel or Reference Selection ...................................................132
17.7 ADC Noise Canceler .....................................................................................132
17.8 Analog Input Circuitry ....................................................................................133
17.9 Noise Canceling Techniques .........................................................................134
17.10 ADC Accuracy Definitions .............................................................................134
17.11 ADC Conversion Result .................................................................................136
17.12 Temperature Measurement ...........................................................................137
17.13 Register Description ......................................................................................138
18 debugWIRE On-chip Debug System .................................................. 143
18.1 Features ........................................................................................................143
18.2 Overview ........................................................................................................143
18.3 Physical Interface ..........................................................................................143
18.4 Software Break Points ...................................................................................144