ATtiny44 datasheet(233/236 Pages) ATMEL

233 / 236 page

iii

8006H–AVR–10/09

ATtiny24/44/84

12.7

Compare Match Output Unit ............................................................................94

12.8

Modes of Operation .........................................................................................96

12.9

Timer/Counter Timing Diagrams ...................................................................103

12.10

Accessing 16-bit Registers ............................................................................105

12.11

Timer/Counter Prescaler ..................................................................... 115

13.1

Prescaler Reset .............................................................................................115

13.2

External Clock Source ...................................................................................115

13.3

USI – Universal Serial Interface .......................................................... 117

14.1

Features ........................................................................................................117

14.2

Overview ........................................................................................................117

14.3

Functional Descriptions .................................................................................118

14.4

Alternative USI Usage ...................................................................................124

14.5

Analog Comparator ............................................................................. 129

15.1

Analog Comparator Multiplexed Input ...........................................................129

15.2

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 .................................................................................143

16.12

Temperature Measurement ...........................................................................144

16.13

debugWIRE On-chip Debug System .................................................. 151

17.1

Features ........................................................................................................151

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