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peripheral clock speeds on STM32f207

Question asked by pataky.ed on May 21, 2014
Latest reply on May 28, 2014 by pataky.ed
i am using STM32f207

i have a flash memory connected to SPI2.  I used the ST examples and i got it working, read/write, .. great, ... the problem is the speed ... how fast can i run SPI2?  

There is a setting SPI_InitStruct.SPI_BaudRatePrescaler and the lowest value is SPI_BaudRatePrescaler_2

In my SetSysClock function i set the dividers to 1:  http://prntscr.com/3lbcy6

This should give me the fastest speed?

My flash goes up to 85MHz and i need to go at least 80MHz because there is a lot of data to read in short time .. will this be possible on SPI2?  I have a 25MHz xtal on the board and i am running the ST at 120MHz via PLL.  

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