Rainbow Electronics ATtiny26L - Manual (Page 148)

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ATtiny26(L)
1477B–AVR–04/02
Universal Serial Interface – USI......................................................... 63
Overview............................................................................................................. 63
Register Descriptions.......................................................................................... 64
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
Register Description for I/O Ports ..................................................................... 105
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