ST92F250 - Bootloader - Access deny to E2prom

sacco_nicolas · ‎2005-10-26

Posted on October 26, 2005 at 12:34

sacco_nicolas · ‎2011-05-17

Posted on May 17, 2011 at 11:37

We use a bootloader on our program. A problem is that sometimes the program cannot read the e2prom at the start of the micro and lauch the bootloader program. Indeed, it cannot read the e2prom flag which should tell him that the user program is present. When the bug comes, the Flash and e2prom is not readable or erasable via the ISP cable.But It uses to work very well on the ST92F120.

Maybe the new micro is more sensitive to voltage spike?

Does anyone have the same problem?

kapil · ‎2011-05-17

Posted on May 17, 2011 at 11:37

Are you using a external E2prom?

Pls check the clock at the time of communication