ATtiny261A datasheet(289/292 Pages) ATMEL

289 / 292 page

iii

8197A–AVR–10/09

ATtiny261A/461A/861A

12.6

Dead Time Generator ......................................................................................94

12.7

Compare Match Output Unit ............................................................................95

12.8

Modes of Operation .........................................................................................97

12.9

Timer/Counter Timing Diagrams ...................................................................104

12.10 Fault Protection Unit ......................................................................................105

12.11 Accessing 10-Bit Registers ............................................................................106

12.12 Register Description ......................................................................................110

13 USI – Universal Serial Interface .......................................................... 123

13.1

Features ........................................................................................................123

13.2

Overview ........................................................................................................123

13.3

Functional Descriptions .................................................................................124

13.4

Alternative USI Usage ...................................................................................129

13.5

14 AC – Analog Comparator .................................................................... 135

14.1

Analog Comparator Multiplexed Input ...........................................................135

14.2

15 ADC – Analog to Digital Converter ..................................................... 140

15.1

Features ........................................................................................................140

15.2

Overview ........................................................................................................140

15.3

Operation .......................................................................................................141

15.4

Starting a Conversion ....................................................................................142

15.5

Prescaling and Conversion Timing ................................................................143

15.6

Changing Channel or Reference Selection ...................................................146

15.7

ADC Noise Canceler .....................................................................................147

15.8

Analog Input Circuitry ....................................................................................147

15.9

Noise Canceling Techniques .........................................................................148

15.10 ADC Accuracy Definitions .............................................................................148

15.11 ADC Conversion Result .................................................................................151

15.12 Temperature Measurement ...........................................................................152

15.13 Register Description ......................................................................................153

16 debugWIRE On-chip Debug System .................................................. 160

16.1

Features ........................................................................................................160

16.2

Overview ........................................................................................................160

16.3

Physical Interface ..........................................................................................160

16.4

Software Break Points ...................................................................................161

ATtiny261A Datasheet(PDF) 289 Page - ATMEL Corporation

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