SELECTION OF MICROCONTROLLER:
As we know that there so many types of micro controller families that are
available in the market.
1) 8051 Family
2) AVR microcontroller Family
3) PIC microcontroller Family
4) ARM Family
Basic 8051 family is enough for our application; hence we are not concentrating
on higher end controller families. In order to fulfill our application basic that is AT89C51
controller is enough. But still we selected AT89S52 controller because of inbuilt ISP (in system
programmer) option. There are minimum six requirements for proper operation of
microcontroller. Those are:
1) power supply section
2) pull-ups for ports (it is must for PORT0)
3) Reset circuit
4) Crystal circuit
5) ISP circuit (for program dumping)
6) EA/VPP pin is connected to Vcc.
PORT0 is open collector that’s why we are using pull-up resistor which makes
PORT0 as an I/O port. Reset circuit is used to reset the microcontroller. Crystal circuit is used
for the microcontroller for timing pluses. In this project we are not using external memory that’s
why EA/VPP pin in the microcontroller is connected to Vcc that indicates internal memory is
used for this application.
10 freelance ont fait une offre moyenne de 30443333 ₹ pour ce travail
I have done projects on Micro-controllers and specially on 8051 family, so I will be comfortable in working on this, based on your description of the project.
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