How to read the hex file of AT89C52 if its lock bits are set

[shahid]

I am working on a project in which i have to read the hex file of AT89C52 microcontroller. Its lock bits are set.

 

there are techniques with the help of which we can manually write or read the data in Flash ROM. but if its lock bits are set how can we unlock it so that we can read the content of Flash ROM.

[GANEEV SINGH]

Hi Shahid

I do not believe that once microcontroller's lock bits are set, any data can be read from it further. I use SinaProg software to set lock bits; may be the reverse could also be possible using the same software, try it out. Once the lock bits are cleared, you just need to read the flash memory and then you could generate a hex file.

Do tell me if it works

[Ashutosh Bhatt]

even after lock if we can read the content of FLASH then whats the use of LOCK?

internal FLASH of micro controller once locked, can not be read. it can be only erased

[Author]

Posts