ST92F150/250 readout-protection

carsten2 · ‎2005-07-27

Posted on July 27, 2005 at 09:15

kapil · ‎2011-05-17

Posted on May 17, 2011 at 11:36

You are right and we should be careful as lot of people doing prototyping, on a soldered parts on PCB, end up with a dead Prototype as it canot be erassed again.

So thinking about Readout protection, Think about IAP first !

carsten2 · ‎2011-05-17

Posted on May 17, 2011 at 11:36

Hello All,

as an answer to some questions regarding the read-out protection there is following to say:

- as written in the datasheet and some AppNotes read AND write access is not possible after setting the bit APRO in register NVAPR. This means erasing is also not possible because erasing means writing of 0xFF to all mem locations. This is clearly mentioned in the datasheet

- a update procedure of a prgrammed and protected device is only possible through IAP with the usage of a so-called bootloader. ST provides a example on www.st.com/mcu

So be carefull to play with it during development. This is something for the end...

carsten