Datasheet

iii
8183F–AVR–06/12
ATtiny24A/44A/84A
12.5 Input Capture Unit ...........................................................................................88
12.6 Output Compare Units .....................................................................................90
12.7 Compare Match Output Unit ............................................................................92
12.8 Modes of Operation .........................................................................................94
12.9 Timer/Counter Timing Diagrams ...................................................................101
12.10 Accessing 16-bit Registers ............................................................................103
12.11 Register Description ......................................................................................106
13 Timer/Counter Prescaler ..................................................................... 113
13.1 Prescaler Reset .............................................................................................113
13.2 External Clock Source ...................................................................................113
13.3 Register Description ......................................................................................114
14 USI – Universal Serial Interface .......................................................... 116
14.1 Features ........................................................................................................116
14.2 Overview ........................................................................................................116
14.3 Functional Descriptions .................................................................................117
14.4 Alternative USI Usage ...................................................................................123
14.5 Register Descriptions ....................................................................................123
15 Analog Comparator ............................................................................. 128
15.1 Analog Comparator Multiplexed Input ...........................................................128
15.2 Register Description ......................................................................................129
16 Analog to Digital Converter ................................................................ 132
16.1 Features ........................................................................................................132
16.2 Overview ........................................................................................................132
16.3 Operation .......................................................................................................133
16.4 Starting a Conversion ....................................................................................134
16.5 Prescaling and Conversion Timing ................................................................135
16.6 Changing Channel or Reference Selection ...................................................138
16.7 ADC Noise Canceler .....................................................................................139
16.8 Analog Input Circuitry ....................................................................................139
16.9 Noise Canceling Techniques .........................................................................140
16.10 ADC Accuracy Definitions .............................................................................140
16.11 ADC Conversion Result .................................................................................142
16.12 Temperature Measurement ...........................................................................143
16.13 Register Description ......................................................................................144