External RAM with FSMC bus + internal crystal.

Posted on February 06, 2012 at 08:19

Hi all,

I have a problem with external RAM on FSMC bus (AHB3).

If I use the external crystal the memory works well (12 Mhz + PLL to 96Mhz ), but if I use the internal crystal at 16Mhz + PLL to 96Mhz I stay blocked in

while((RCC->CR & RCC_CR_PLLRDY) == 0)

{

}

in system_stm32f4xx.c or go to HardFault interrupt...

Is there a known limitation AHB3/Internal crystal ?

Thanks

Mikael

#fsmc-external-ram

0 REPLIES 0