ATtiny43U datasheet(178/182 Pages) ATMEL

178 / 182 page

8048B–AVR–03/09

ATtiny43U

7.1

Sleep Modes ....................................................................................................31

7.2

Software BOD Disable .....................................................................................32

7.3

Power Reduction Register ...............................................................................32

7.4

Minimizing Power Consumption ......................................................................33

7.5

Power Supply and On-Chip Boost Converter ...................................... 36

8.1

Overview ..........................................................................................................36

8.2

Modes of Operation .........................................................................................37

8.3

Output Voltage versus Load Current ...............................................................40

8.4

Overload Behaviour .........................................................................................42

8.5

Software Control of Boost Converter ...............................................................42

8.6

Component Selection ......................................................................................43

8.7

Typical Applications .........................................................................................46

8.8

Characteristics .................................................................................................46

8.9

Potential Limitations ........................................................................................46

8.10

Bypassing the Boost Converter .......................................................................46

8.11

System Control and Reset .................................................................... 48

9.1

Resetting the AVR ...........................................................................................48

9.2

Reset Sources .................................................................................................49

9.3

Power-on Reset ...............................................................................................49

9.4

External Reset .................................................................................................50

9.5

Brown-out Detection ........................................................................................50

9.6

Watchdog Reset ..............................................................................................51

9.7

Internal Voltage Reference ..............................................................................51

9.8

Watchdog Timer ..............................................................................................51

9.9

Interrupts ................................................................................................ 57

10.1

Interrupt Vectors ..............................................................................................57

10.2

External Interrupts ...........................................................................................58

10.3

I/O Ports .................................................................................................. 62

11.1

Introduction ......................................................................................................62

11.2

Ports as General Digital I/O .............................................................................63

11.3

Alternate Port Functions ..................................................................................67

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