How to erase 20 bytes in flash not all sector?

k_arthur · ‎2007-11-16

Posted on November 16, 2007 at 10:54

k_arthur · ‎2011-05-17

Posted on May 17, 2011 at 09:46

Hi all.

I need to erase only 20 bytes in flash memory.In STR9 Flash Programming Manual no word about it. I tried to write (erase) twenty - 0xFF bytes and after that to write needed bytes. It not work. How to do it?

jgoril · ‎2011-05-17

Posted on May 17, 2011 at 09:46

It is not possible to erase single byte(s) for STR9 devices flash memory. You can erase whole sector only.

m_tibu · ‎2011-05-17

Posted on May 17, 2011 at 09:46

Just to puntualize,

it is not possible to erase part of sector in a flash memory in general.

Suggestion:

- Copy all the block in RAM and then erase and re-program, coping back whole sector, kepping blank the 20 bytes

Marco