AT90PWM2 datasheet(360/365 Pages) ATMEL

360 / 365 page

360

AT90PWM2/3

4317B–AVR–02/05

Table of Contents

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

Disclaimer .............................................................................................. 2

Pin Configurations................................................................................ 3

Pin Descriptions..................................................................................................... 5

Overview................................................................................................ 8

Block Diagram ...................................................................................................... 8

Pin Descriptions................................................................................................... 10

About Code Examples ........................................................................................ 11

AVR CPU Core .................................................................................... 12

Introduction ......................................................................................................... 12

Architectural Overview........................................................................................ 12

ALU – Arithmetic Logic Unit................................................................................ 13

Status Register .................................................................................................... 14

General Purpose Register File ........................................................................... 15

Stack Pointer ...................................................................................................... 16

Instruction Execution Timing............................................................................... 16

Reset and Interrupt Handling.............................................................................. 17

Memories ............................................................................................. 20

In-System Reprogrammable Flash Program Memory ........................................ 20

SRAM Data Memory............................................................................................ 21

EEPROM Data Memory....................................................................................... 23

I/O Memory .......................................................................................................... 28

General Purpose I/O Registers............................................................................29

System Clock ...................................................................................... 30

Clock Systems and their Distribution .................................................................. 30

Clock Sources..................................................................................................... 31

Default Clock Source .......................................................................................... 31

Low Power Crystal Oscillator............................................................................... 32

Calibrated Internal RC Oscillator ........................................................................ 33

PLL ..................................................................................................................... 34

128 kHz Internal Oscillator.................................................................................. 36

External Clock..................................................................................................... 36

Clock Output Buffer ............................................................................................ 36

System Clock Prescaler...................................................................................... 37

Power Management and Sleep Modes.............................................. 39

Idle Mode ............................................................................................................. 40

ADC Noise Reduction Mode............................................................................... 40

AT90PWM2 Datasheet(PDF) 360 Page - ATMEL Corporation