Rainbow Electronics ATtiny43U - Manual (Page 178)

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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 Register Description ........................................................................................34
8 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 Register Description ........................................................................................47
9 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 Register Description ........................................................................................54
10 Interrupts ................................................................................................ 57
10.1 Interrupt Vectors ..............................................................................................57
10.2 External Interrupts ...........................................................................................58
10.3 Register Description ........................................................................................59
11 I/O Ports .................................................................................................. 62
11.1 Introduction ......................................................................................................62
11.2 Ports as General Digital I/O .............................................................................63
11.3 Alternate Port Functions ..................................................................................67