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AVR MICROCONTROLLERATMEGA8515

DEVELOPMENT SYSTEMITKORBA 09 SEPT. 2011

GUIDED BYMRS. SHILPA MANOJ RAWTEM.TECH

PRESENTED BYDEEPAK SINGH (12)RISHABH JAISWAL(36)ROHIT KUMAR SAHU(37)VIKALP TIWARI(51)

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Whats inside Smart Things

Human being is only smart living creature in the world.

Now he needs to be surrounded by smart things in hislife so he started making things smarter.

It is the capability of learning and remembering thatmakes anything smarter.

A single chip that is having learning power andmemory element within itself is called as amicrocontroller that is a entire computer on single chip.

Today every smart appliance, device, vehicle containsa microcontroller for fast processing and smarteroperation.

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Whats inside Smart things

So today, fast growing technology needs things notonly smart but smartest amongst all.

ATMEL decided to change the DNAs of the old Intels

8051 architecture to make a new generation ofmicrocontrollers.

With this idea two students of Norwegian Institute of

Technology (NTH)Alf-Egil Bogen and Vegard Wollanworked for ATMEL for development of RISC basedmicrocontroller with a on chip flash memory to storeprograms.

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ATMEL AVR FAMILY

The AVR is a modified Harvard architecture 8-bit RISC single chip microcontroller which wasdeveloped by Atmel in 1996.

The AVR was one of the first microcontrollerfamilies to use on-chip flash memory forprogram storage.

AVR is named after its designers Alf egilbogen and Vegard wollan and AVR stands forAlf & Vegans Risk architecture.

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AVR Family Members

There are five members from this family: TinyAVR

MEGAAVR

XMEGAApplication Specific AVRFPSLIC (AVR with FPGA)

Among these ATMEGA8515 is the oldest andmost promising replacement for 8051because it is pin compatible with 8051.

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ATMEGA8515 Features

Flash memory 8KBytes

Pin count 40 pin DIP

Max. working

frequency 16MHz

CPU 8 bit AVR

Qtouch channels16

Internal clock 8MHz

On-chip Timer/ Counter,Watchdog timer,Programmable serial UART,Analog comparator

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ATMEGA8515 Pin description

Its most of the pins aresimilar to 8051.

It has 5 PORTS namelyPORT A- Pin#32-39 Also low

order address lines

PORT B- Pin#1-8PORT C- Pin#21-28PORT D- Pin#10-17 Also

high order address linesPORT E- Pin#29-31 Its other pins areVcc- PIN#40

GND- PIN#20

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Pin Description contd.....

RESET- Pin#9- Active lowXTAL1/2- Pin#18/19

MISO- Master In SlaveOut- Pin#7

MOSI- Master Out SlaveIn- Pin#6

SS- Pin#5- Slave Selectactive low line

AIN0/1- Pin#3/4- Analogcomparator INput line

SCK- Pin#8 Slave ClockInput used for ISP

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Pin Description contd.....

OC1A/B- Pin#15/29 Output ofTimer/Counter1

RXD/TXD- Pin#10/11-Receive/Transmit serial data

T0/T1- Pin#1/2- Timer 1/2

external controlICP- Pin#31- Input for

Timer/Counter 1

ALE- Pin#30

WR/RD- Pin#16/17- Write Readactive low pin

INT0/1- Pin#12/13- ExternalInterrupt control pin

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Development Boards

A microcontrollerdevelopment board is aprinted circuit boardcontaining a microprocessorand the minimal support logic

needed for an engineer tobecome acquainted with themicrocontroller on the board,and to learn to program it. Italso served users of themicroprocessor as a method

to prototype applications inproducts.

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Development Boards

Unlike a general-purpose system such as a homecomputer, usually a development board contains littleor no hardware dedicated to a user interface. It willhave some provision to accept and run a user-

supplied program, such as downloading a programthrough a serial port to flash memory, or some form ofprogrammable memory in a socket in systems.

The reason for the existence of a development boardwas only to provide a system for learning to use a new

microprocessor, not for entertainment. So everythingsuperfluous was left out to keep costs down.

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ISP (In-System Programming )

In-System Programming (ISP) is the ability of someprogrammable logic devices, microcontrollers, and otherprogrammable electronic chips to be programmed while installedin a complete system, rather than requiring the chip to beprogrammed prior to installing it into the system.

The primary advantage of this feature is that it allows

manufacturers of electronic devices to integrate programming andtesting into a single production phase, rather than requiring aseparate programming stage prior to assembling the system. Thismay allow manufacturers to program the chips in their ownsystem's production line instead of buying preprogrammed chipsfrom a manufacturer or distributor, making it feasible to apply

code or design changes in the middle of a production run.

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STK 200/300

The STK200 Flash MCUStarter Kit is a complete low-cost evaluation system for theAtmel 8 Bit flashmicrocontrollers. It uses anoctal buffer and DB25Pconnection to connect itthrough parallel port ofcomputer. It can work to avery low voltages as low as3V. The ISP out from

development board is directlyconnected to the on chipmale connector as shown.

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STK 200/300