Posted on June 25, 2014 at 09:31Hello guys i m New to STM32 , i m using Keil ARM tools.I have written LED Blinky code with STM32F051C8 the following code .In the below code if i change RCC_CFGR_PLLMULL2 to RCC_CFGR_PLLMULLX(X=3,4,6....12) My LED bli...