ATtiny25 datasheet(193/196 Pages) ATMEL

193 / 196 page

193

7598H–AVR–07/09

ATtiny25/45/85

12.3

Counter Unit ....................................................................................................62

12.4

Output Compare Unit .......................................................................................63

12.5

Compare Match Output Unit ............................................................................65

12.6

Modes of Operation .........................................................................................66

12.7

Timer/Counter Timing Diagrams .....................................................................70

12.8

8-bit Timer/Counter Register Description ........................................................72

Timer/Counter Prescaler ....................................................................... 78

13.1

Prescaler Reset ...............................................................................................78

13.2

External Clock Source .....................................................................................79

Counter and Compare Units ................................................................. 81

14.1

Timer/Counter1 ................................................................................................81

Dead Time Generator ............................................................................. 93

15.1

Timer/Counter1 Dead Time Prescaler register 1 - DTPS1 ..............................94

15.2

Timer/Counter1 Dead Time A - DT1A .............................................................95

15.3

Timer/Counter1 Dead Time B - DT1B .............................................................95

Universal Serial Interface – USI ............................................................ 96

16.1

Overview ..........................................................................................................96

16.2

Functional Descriptions ...................................................................................97

16.3

Alternative USI Usage ...................................................................................103

16.4

USI Register Descriptions .............................................................................103

Analog Comparator ............................................................................. 108

17.1

ADC Control and Status Register B – ADCSRB ...........................................108

17.2

Analog Comparator Control and Status Register – ACSR ............................108

17.3

Analog Comparator Multiplexed Input ...........................................................110

Analog to Digital Converter ................................................................ 111

18.1

Features ........................................................................................................111

18.2

Operation .......................................................................................................112

18.3

Starting a Conversion ....................................................................................113

18.4

Prescaling and Conversion Timing ................................................................114

18.5

Changing Channel or Reference Selection ...................................................117

18.6

ADC Noise Canceler .....................................................................................118

18.7

ADC Conversion Result .................................................................................121

debugWIRE On-chip Debug System .................................................. 128

19.1

Features ........................................................................................................128

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