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Can't disable Read Out Protection

Rainer Fuchs

We had run our STM32F207 Hardware over night with a battery. Now the battery is empty and we can't flash the STM32F207 with Ulink Me (of course with proper powersupply).

Ulink says: Error: Flash Download failed - "Cortex-M3"

We can check the RDP register: the value is 0xff so we are in RDP Level 1.

We try to flash the STM32F207 with the " erase full chip"-Option but Full Chip Erase failed. If we try to flash an other STM32F207-Hardware this works fine.

So we tried to flash \Keil\ARM\Boards\Keil\MCBSTM32F200\Blinky with OPTs set to Level 0 but we can't flash it.

So we have 2 Questíons

How is it posible that the Level change form 0 to 1 without any line of code to do this?
How can we disable the Read Out Protection with Ulink Me?

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