AVR教程 AVR introduction.pptVIP

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AVR教程 AVR introduction

December 2004 Introduction The beginning AVR started as a student project / diploma thesis at NTNU (University of Trondheim) In 91/92 the students Alf-Egil Bogen and Vegard Wollan started their idea of designing “a perfect RISC processor” The results where a processor; with assembler and simulator. They named it μRISC and it was used in several ASICs by a local ASIC company. But in 1995 the time was right to market it as a dedicated product... Atmel Corporation Atmel Corporation was choicen as partner; due to that they where, and still are, the worlds leading vendor of FLASH and EEPROM memories. What could Atmel offer μRISC? Technology μRISC could become one of the first microcontrollers with Flash program memory The competitors program memory where mainly EPROM or ROM Semiconductor fabs Atmel had their own fabs Better control on production and technology Established sales force Atmel was established in 1984 and had in 1995 a well founded world wide sales force. Money It is expensive to develop new products... μRISC changes name to AVR Bogen and Wollan makes a deal with Atmel on further development and sales of the μRISC Extensive development is put into the μRISC and they change the name to AVR The agreements target is to establish a yearly revenue of AVR products of $100mil within 5years As a part of the agreement they establish Atmel Norway Atmel Norway gets the main responsibility to develop and market the AVR microcontrollers The first AVR is released in 1997 AT90S1200 Their goal of $100mil is achieved in 2002 AVR Historical Roadmap AVR Microcontroller Shipments The AVR Product Family Family ranges from 1K to 256K devices All devices based on same AVR architecture All with FLASH program memory One set of development tools Reduces tools cost Only one user interface to learn The World’s Leading 8-bit Architecture RISC architecture with CISC instruction set Easy to learn and powerful instruction set for C and Assembly Single cycle execution One instruction p

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