364
7647H–AVR–03/12
Atmel ATmega16/32/64/M1/C1
19 ISRC - Current Source .......................................................................258
19.1 Features .....................................................................................................258
19.2 Typical applications ....................................................................................259
19.3 Control Register ..........................................................................................261
20 Analog Comparator ...........................................................................262
20.1 Features .....................................................................................................262
20.2 Overview .....................................................................................................262
20.3 Use of ADC Amplifiers ................................................................................263
20.4 Analog Comparator Register Description ...................................................264
21 Digital to Analog Converter - DAC ...................................................270
21.1 Features .....................................................................................................270
21.2 Operation ....................................................................................................271
21.3 Starting a Conversion .................................................................................271
21.4 DAC Register Description ...........................................................................272
22 Analog Feature Considerations.........................................................275
22.1 Purpose ......................................................................................................275
22.2 Use of an Amplifier as Comparator Input ...................................................275
22.3 Use of an Amplifier as Comparator Input and ADC Input ...........................275
22.4 Analog Peripheral Clock Sources ...............................................................276
23 debugWIRE On-chip Debug System ................................................277
23.1 Features .....................................................................................................277
23.2 Overview .....................................................................................................277
23.3 Physical Interface .......................................................................................277
23.4 Software Break Points ................................................................................278
23.5 Limitations of debugWIRE ..........................................................................278
23.6 debugWIRE Related Register in I/O Memory .............................................278
24 Boot Loader Support – Read-While-Write Self-Programming
ATmega16/32/64/M1/C1 .....................................................................279
24.1 Boot Loader Features .................................................................................279
24.2 Application and Boot Loader Flash Sections ..............................................279
24.3 Read-While-Write and No Read-While-Write Flash Sections .....................280
24.4 Boot Loader Lock Bits ................................................................................282
24.5 Entering the Boot Loader Program .............................................................283
24.6 Addressing the Flash During Self-Programming ........................................285
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