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Bootloader for P89LPC936

Question asked by Philip Weigl on Nov 5, 2018


I have accidentally set the wrong secure bits (Block 0 Sec 1 and 2) on a p89lpc936. The only way I found to clear them was to erase the complete flash including the bootloader. Is there any possibility to clear them, without erasing the bootloader?

If not, I think it should be possible to reprogram the bootloader again. But I do not have the HEX-file for the bootloader. Is it possible to download it somewhere? Or is there a way to read it from a working second chip?

Any help is welcome. Thanx a lot.


Best Regards,