Datasheet

iii
8197C–AVR–05/11
ATtiny261A/461A/861A
12.5 Output Compare Unit .......................................................................................93
12.6 Dead Time Generator ......................................................................................95
12.7 Compare Match Output Unit ............................................................................96
12.8 Modes of Operation .........................................................................................98
12.9 Timer/Counter Timing Diagrams ...................................................................105
12.10 Fault Protection Unit ......................................................................................106
12.11 Accessing 10-Bit Registers ............................................................................107
12.12 Register Description ......................................................................................111
13 USI – Universal Serial Interface .......................................................... 124
13.1 Features ........................................................................................................124
13.2 Overview ........................................................................................................124
13.3 Functional Descriptions .................................................................................125
13.4 Alternative USI Usage ...................................................................................130
13.5 Register Descriptions ....................................................................................131
14 AC – Analog Comparator .................................................................... 136
14.1 Analog Comparator Multiplexed Input ...........................................................136
14.2 Register Description ......................................................................................138
15 ADC – Analog to Digital Converter ..................................................... 141
15.1 Features ........................................................................................................141
15.2 Overview ........................................................................................................141
15.3 Operation .......................................................................................................142
15.4 Starting a Conversion ....................................................................................143
15.5 Prescaling and Conversion Timing ................................................................144
15.6 Changing Channel or Reference Selection ...................................................147
15.7 ADC Noise Canceler .....................................................................................148
15.8 Analog Input Circuitry ....................................................................................148
15.9 Noise Canceling Techniques .........................................................................149
15.10 ADC Accuracy Definitions .............................................................................149
15.11 ADC Conversion Result .................................................................................152
15.12 Temperature Measurement ...........................................................................153
15.13 Register Description ......................................................................................154
16 debugWIRE On-chip Debug System .................................................. 161
16.1 Features ........................................................................................................161
16.2 Overview ........................................................................................................161
16.3 Physical Interface ..........................................................................................161