AnsweredAssumed Answered

Can not update option bytes.

Question asked by musatoff.constantine on Dec 17, 2013
Latest reply on Dec 18, 2013 by musatoff.constantine
I use STLink v2 to develop project with STM32. Current project is based on STM32F417 chip. Problem with option bytes stand up unexpectedly. Disconnection STLink from computer and board did not solve problem. I can't to clear option bytes from windows utility "STM32 ST-LINK Utility.exe" and from command line utility:

ST-LINK_CLI.exe -OB RDP=0 -rOB 


STM32 ST-LINK CLI v1.3.0
STM32 ST-LINK Command Line Interface


Connected via SWD.
Device ID:0x411 
Device family :STM32F4xx
Updating option bytes...
Could not update the option bytes!


Option bytes:
RDP         : Level 1
IWDG_SW     : 1
nRST_STOP   : 1
nRST_STDBY  : 1
BOR         : Level 0
WRP         : 0x00000FFF


I had this problem twice and solve it by connecting to STLink board with another chip then 417. But I have not any other board with ST chip now. Get me method to solve this problem.

Outcomes