ATmega32HVB datasheet(266/273 Pages) ATMEL

266 / 273 page

8042A–AVR–07/09

ATmega16HVB/32HVB

Table of Contents

Features ..................................................................................................... 1

Pin Configurations ................................................................................... 2

1.1TSSOP ......................................................................................................................2

1.2Pin Descriptions .........................................................................................................2

Overview ................................................................................................... 5

2.1Comparison Between ATmega16HVB and ATmega32HVB .....................................7

Disclaimer ................................................................................................. 8

Resources ................................................................................................. 8

About Code Examples ............................................................................. 8

Data Retention .......................................................................................... 8

AVR CPU Core .......................................................................................... 9

7.1Overview ....................................................................................................................9

7.2ALU – Arithmetic Logic Unit .....................................................................................10

7.3Status Register ........................................................................................................10

7.4General Purpose Register File ................................................................................12

7.5Stack Pointer ...........................................................................................................13

7.6Instruction Execution Timing ...................................................................................14

7.7Reset and Interrupt Handling ...................................................................................14

AVR Memories ........................................................................................ 17

8.1Overview ..................................................................................................................17

8.2In-System Reprogrammable Flash Program Memory .............................................17

8.3SRAM Data Memory ................................................................................................17

8.4EEPROM Data Memory ..........................................................................................19

8.5I/O Memory ..............................................................................................................19

8.6Register Description ................................................................................................20

System Clock and Clock Options ......................................................... 25

9.1Clock Systems and their Distribution .......................................................................25

9.2Clock Sources .........................................................................................................26

9.3Clock Startup Sequence ..........................................................................................28

9.4Clock Output ............................................................................................................28

9.5System Clock Prescaler ..........................................................................................28

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