piclist 2003\06\18\055259a >
Thread: Reading EEPROM when lockbits are set ?
www.piclist.com/techref/mems.htm?key=eeprom
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face BY : Reelf Monsees email (remove spam text)



Hi,
we have to service a device containing a AT90S1200. Unfortunately, there is no documentation at all. The relevant information is
stored in the EEPROM of the controller, program-data doesn't matter for
us as we have write a new program anyway. As both lockbits are set, reading the EEPROM with a programmer is not
possible (or is it?). So we could write a program for the 90S1200
that transmits the data from the EEPROM trough one pin serially.
But there doesn't seem to be a way to erase and rewrite the program-
memory without erasing the EEPROM as well (or is there ?).
If anybody comes up with an idea, that would be great !

regards,
   Reelf
-- SyWiTec *  Systeme für Wissenschaft und Technik
            Bamberg & Monsees GbR
        Steindamm 22 * D-28719 Bremen
  Fon +49-421-646775 * Fax +49-421-646785
            http://www.sywitec.de/

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Subject (change) Reading EEPROM when lockbits are set ?

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