Rainbow-electronics ATtiny26L Manual do Utilizador descarregar pdf (Página 148)

ATtiny26(L)

1477B–AVR–04/02

Universal Serial Interface – USI......................................................... 63

Overview............................................................................................................. 63

Functional Descriptions ...................................................................................... 68

Alternative USI Usage ........................................................................................ 73

Analog Comparator ............................................................................ 74

Analog to Digital Converter ............................................................... 77

Features.............................................................................................................. 77

Operation ............................................................................................................ 78

Prescaling and Conversion Timing ..................................................................... 79

ADC Noise Canceler Function............................................................................ 82

ADC Conversion Result...................................................................................... 82

Scanning Multiple Channels ............................................................................... 88

ADC Noise Canceling Techniques ..................................................................... 88

Offset Compensation Schemes .......................................................................... 88

I/O Ports............................................................................................... 90

Introduction ......................................................................................................... 90

Ports as General Digital I/O ................................................................................ 91

Alternate Port Functions ..................................................................................... 95

Memory Programming...................................................................... 106

Program and Data Memory Lock Bits............................................................... 106

Fuse Bits........................................................................................................... 107

Signature Bytes ................................................................................................ 108

Calibration Byte ................................................................................................ 108

Parallel Programming Parameters, Pin Mapping, and Commands .................. 108

Parallel Programming ....................................................................................... 111

Serial Downloading........................................................................................... 120

Serial Programming Pin Mapping ..................................................................... 120

Electrical Characteristics................................................................. 125

Absolute Maximum Ratings*............................................................................. 125

External Clock Drive Waveforms ...................................................................... 127

External Clock Drive ......................................................................................... 127

ADC Characteristics – Preliminary Data......................................... 128

ATtiny26 Typical Characteristics – Preliminary Data.................... 129

ATtiny26/L Register Summary......................................................... 138

Instruction Set Summary ................................................................. 139

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Rainbow-electronics ATtiny26L Manual do Utilizador Página 148