AMTEL 89S52 IC Flash Programming Problem

89s52 programmer

Hi guys,

I have been trying to make a programmer board for programming possibly each and every In system programmable microcontroller. I have used the simple circuit of interfacing the microcontroller under programming with the parallel port through the buffer 74HCT541.

I am not able to get this circuit work. I have debugged it many a times. Can u suggest any other type of programming technique for the In System programmer.

Thank you for your kind attention.

Regards.

89s52 programmer circuit

hi
can u upload the schematic so we can chek it ti be sure that it dont contain any errors???
hava a nice day
salam
Ahmed

ic 89s52

Hi pnnavigator0915,

This problem has been discussed many times on forum.

Did you tried this kind of circuit interface ?

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If yes, bear in mind that you have to short pin 2 and 12 of DB25 connector when using software **broken link removed**

As the name said (In-System-Programming) you need microcontroller already fitted in your board with a crystal oscilator (min 3MHz) running and +5v rail stable.

You need then some design tips regarding pins P1.5 P1.6 and P1.7 involved in programming and used by your application, too.

But if you tried to program the AT89S52 "in the air" (despite the ISP name) then you can use this circuit, which supplies the system clock at pin XTAL1, too.

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More details here: **broken link removed**

You can even try loading through SPI interface without 74HCT541 inteface :

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though not recommended. But you still need the crystal fitted to AT89S52.

89s52 programming

Thank you for your sincere efforts guys.

Yes i have tried the first circuit.

Hey thank you silvio, I didn't know about shorting the pin numbers 2 and 12. I would surely try out this thing and inform about the further developments.


Thank you for ur kind attention.

Regards

89s52 isp programmer

I've also used the same circuit with pins 2 and 12 shorted.The software does not recognized my device correctly.It reads the microcontroller only when 89S53 is selected,though mine is 89S51.Also there is an error while writing,says that

program buffer 00h
data buffer 80h

Please help me on this

programming 89s52

pnnavigator0915 said:

Hi guys,

I have been trying to make a programmer board for programming possibly each and every In system programmable microcontroller. I have used the simple circuit of interfacing the microcontroller under programming with the parallel port through the buffer 74HCT541.

I am not able to get this circuit work. I have debugged it many a times. Can u suggest any other type of programming technique for the In System programmer.

the Adam Dybkowski programming software down-loadable from there, will help as it has facility to define any pin for any purpose
Thank you for your kind attention.

Regards.

Click to expand...

Try using the ISP programmer from www.ikalogic.com/isp.php
try reading the forum for certain clues, and you will go thro
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