AT43USB326 datasheet(100/102 Pages) ATMEL

100 / 102 page

AT43USB326

3313D–USB–04/06

Table of Contents

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

Description ........................................................................................... 1

Pin Configuration .................................................................................................. 2

Pin Assignment..................................................................................................... 3

Signal Description................................................................................................. 4

Architectural Overview........................................................................ 6

The General-purpose Register File .................................................... 7

X-, Y- and Z- Registers ......................................................................................... 8

ALU – Arithmetic Logic Unit.................................................................................. 8

Program Memory .................................................................................................. 8

SRAM Data Memory............................................................................................. 9

I/O Memory ......................................................................................................... 14

USB Hub............................................................................................................. 15

Functional Description ...................................................................... 17

On-chip Power Supply ........................................................................................ 17

I/O Pin Characteristics ........................................................................................ 17

Oscillator and PLL .............................................................................................. 17

Reset and Interrupt Handling.............................................................................. 18

Reset Sources .................................................................................................... 20

Power-on Reset .................................................................................................. 21

External Reset .................................................................................................... 22

Watchdog Timer Reset ....................................................................................... 22

Non-USB Related Interrupt Handling.................................................................. 22

External Interrupts .............................................................................................. 26

Interrupt Response Time .................................................................................... 26

USB Interrupt Sources........................................................................................ 28

USB Endpoint Interrupt Sources......................................................................... 29

AVR Register Set ............................................................................... 34

Status Register and Stack Pointer...................................................................... 34

Sleep Modes....................................................................................................... 35

Timer/Counter .................................................................................... 36

Timer/Counter Prescaler..................................................................................... 36

8-bit Timer/Counter0........................................................................................... 37

Watchdog Timer ................................................................................................. 39

I/O Ports.............................................................................................. 40

Port A.................................................................................................................. 41

Port B.................................................................................................................. 42

Port C.................................................................................................................. 43

Port D.................................................................................................................. 44

AT43USB326 Datasheet(PDF) 100 Page - ATMEL Corporation

AT43USB326 Datasheet(HTML) 100 Page - ATMEL Corporation

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