ATtiny13A datasheet(171/174 Pages) ATMEL

171 / 174 page

iii

8126D–AVR–11/09

ATtiny13A

13.2

14 Analog to Digital Converter .................................................................. 82

14.1

Features ..........................................................................................................82

14.2

Overview ..........................................................................................................82

14.3

Operation .........................................................................................................83

14.4

Starting a Conversion ......................................................................................83

14.5

Prescaling and Conversion Timing ..................................................................84

14.6

Changing Channel or Reference Selection .....................................................87

14.7

ADC Noise Canceler .......................................................................................88

14.8

Analog Input Circuitry ......................................................................................88

14.9

Analog Noise Canceling Techniques ...............................................................89

14.10 ADC Accuracy Definitions ...............................................................................89

14.11 ADC Conversion Result ...................................................................................92

14.12 Register Description ........................................................................................92

15 debugWIRE On-chip Debug System .................................................... 96

15.1

Features ..........................................................................................................96

15.2

Overview ..........................................................................................................96

15.3

Physical Interface ............................................................................................96

15.4

Software Break Points .....................................................................................97

15.5

Limitations of debugWIRE ...............................................................................97

15.6

16 Self-Programming the Flash ................................................................. 98

16.1

Performing Page Erase by SPM ......................................................................98

16.2

Filling the Temporary Buffer (Page Loading) ...................................................98

16.3

Performing a Page Write .................................................................................99

16.4

Addressing the Flash During Self-Programming .............................................99

16.5

EEPROM Write Prevents Writing to SPMCSR ..............................................100

16.6

Reading Fuse and Lock Bits from Firmware .................................................100

16.7

Preventing Flash Corruption ..........................................................................101

16.8

Programming Time for Flash when Using SPM ............................................101

16.9

17 Memory Programming ......................................................................... 103

17.1

Program And Data Memory Lock Bits ...........................................................103

17.2

Fuse Bytes .....................................................................................................104

17.3

Calibration Bytes ...........................................................................................105

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