Disable HSI RC when using PLL-HSE as system clock

[michaellange9]

Posted on July 15, 2008 at 12:21

Disable HSI RC when using PLL-HSE as system clock

[michaellange9]

Posted on May 17, 2011 at 12:39

Hey gays,

I'm using the STM3210B-Eval board with IAR EWB and writing my own firmware for better understanding the micro... When I configure the PLL circuit driven by the 8MHz external oszillator (HSE is choosen), can't I turn off the HSI RC part by writing Bit HSION in Register RCC_CR to 0? I'm doing that at the end, when all other clock configurations are done. My debugger runs to memory ''0xFFFFFFFF UNDEFINED INSTRUCTION''... Cheers, Michael

[michaellange9]

Posted on May 17, 2011 at 12:39

Ok...solved by setting the correct Flash Latency... (RM0008 page 40)