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 How to read protected code ?
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Republic of Korea
1 Posts

Posted - 01/06/2006 :  20:26:34  Show Profile  Reply with Quote
Hi all,
I am new to pic programming.
I have installed TOP 2005 yesterday.

I worked several pic mcus with successful result.
But I have a problem with code protected mcu( I think it may be protected).

It is 16F84A, and programmed code is a simple electronic keyer for HAM made by one of ham friends who is not reachable now.
The probelem is,
It has a side tone output of 1000 Hz, and it is too high frequency for my use. So I want to change it to 500 or 600 Hz.
I tried to read that mcu on top 2005.
But the read data is only 00 or FF, meaning no data read.

If I press [read config] button, the return shows all check box is checked in [config] window box.

How can I read the program source and data from this mcu ?

I will make some code changes to fit my taste and I will use it for only my personal use.
So any help will be greatly aprreciated.


Dongil Park, M.D.

Edited by - dipark on 01/06/2006 20:28:31
Reply #1


2926 Posts

Posted - 01/08/2006 :  18:56:13  Show Profile  Reply with Quote
No way to read the code on the chip if it is been protected.
In most of comercial product, they just want to protect their copy right.
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