unbrick at89s8253

[rickyy]

hello, I'm not any programmer and I want to ask.
I accidentally made a mistake, I caused 1 pcs ic at89s8253 to be accidentally locked lb1 lb2 lb3.
then I bought Xgecu T48, can Xgecu remove the lock on at89s8253?
so that the program in at89s8253 can look like before
thank you

 

[Bluejets]

Think you will find whatever was there is either gone or corrupted with only recovery avenue being starting again from scratch with original code.

 

[rickyy]

Think you will find whatever was there is either gone or corrupted with only recovery avenue being starting again from scratch with original code.

thanks for the hint, but it can't be unlocked?
because it belongs to the lab and I made a mistake in trying it

 

[Harald Kapp]

There is usually no way to "unlock" such a controller. The locking mechanisms provided by these controllers are meant to prevent unauthorized users from extracting the code from the internal memory. In which way the controller is locked may depend on which "mistake" you made. Usually a so called fuse is programmed to activate the locking mechanism. This fuse can be restored only by re-programming the whole chip - which is obviously possible only if you have access to the original firmware.
Unless you have another, identical and unlocked chip to extract the firmware, your chances of repairing you rmistake are next to nil.

 

[ahsrabrifat]

hello, I'm not any programmer and I want to ask.
I accidentally made a mistake, I caused 1 pcs ic at89s8253 to be accidentally locked lb1 lb2 lb3.
then I bought Xgecu T48, can Xgecu remove the lock on at89s8253?
so that the program in at89s8253 can look like before
thank you

The XGecu T48 supports the AT89 series, including the AT89S8253, for programming. However, it cannot bypass or remove the lock bits without performing a full erase.

 

[rickyy]

The XGecu T48 supports the AT89 series, including the AT89S8253, for programming. However, it cannot bypass or remove the lock bits without performing a full erase.

thank you for information

 

[rickyy]

There is usually no way to "unlock" such a controller. The locking mechanisms provided by these controllers are meant to prevent unauthorized users from extracting the code from the internal memory. In which way the controller is locked may depend on which "mistake" you made. Usually a so called fuse is programmed to activate the locking mechanism. This fuse can be restored only by re-programming the whole chip - which is obviously possible only if you have access to the original firmware.
Unless you have another, identical and unlocked chip to extract the firmware, your chances of repairing you rmistake are next to nil.

oh okay, thank you