As you are well aware that in configuring a computer
programmers are used. These programmers must be inexpensive full featured for
almost all the common microcontroller’s most common 8051 micro controller.
These programmers’ works on serial parts to programmer erase and blank check,
write lock bits, read and verify code data. This programmer working on USB port
has the ability to verify the chip number.
So that it may be useful to find number erased chip.
To the demand of such microcontrollers a series of 8 bit
microcontrollers (mCs) were developed and researched by the ATMEAL Corporation&
designated series as ATMEL AT89 which is in harmony with an Intel 8051.
ATMEL AT89 series of microprocessor based on the Intel 8051
core are very popular even now- a – days as a general purpose microprocessor
because of their industry instruction set and low unit cost and allowing to be
used again and again without making any changes in new application.
With the invasion of computer the need of programmer was
felt and to full fill the same programmer firstly introduced to a non- volatile
semiconductor device with data stored on punched cards or ASC II encoded (eight
level) punch card paper tape to give liberty to electronic designer to design a
program and remained in vogue for more than three decades. At present the semi-
conductor devices/equipment to transfer data in to different nonvolatile are in
use commonly can be categories in three categories as flash memory, micro
controller devices and programmable logic device. Before the introduction of
graphical display devices, the programmers was a device which was mostly using
switches and LEDs to enter the instructions one by one by setting the stitches
in a series of ‘on’ and “off” positions.
These positions of switches are in correspondence with the assembly language now
a day in use. Presently the device based on switches and LEDs are almost are
not in vogue and is outdated.
There are four kinds of device programmer gang programmer,
development programmer, pocket programmer & specialized programmer to put
in to use according totheir utility.
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