Skip to main content
Associate III
July 13, 2023
Solved

FMC Clock Mux not found

  • July 13, 2023
  • 1 reply
  • 1475 views

Hello,

Im working on a Project, which i use with it STM32F750N8H6 with external Memory and im trying to interface them to each other.

I have so far now done the Configuation of GPIO, TimingParameters..etc but i wanted giving too the Value of the Clock Frequncy for SDRAM in Clock-Configuation, then i have not found the FMC-Clock Mux!

Where can i entering the Value in order to make the Interface well working?

Thanks,

This topic has been closed for replies.
Best answer by Ghofrane GSOURI

Hello @mids400 

First let me thank you for posting.

Based on the RM0385 : The AHB clock (HCKL) is the reference clock for the FMC.

GhofraneGSOURI_0-1689256633091.png

So in order to change the clock frequency you need to change the HCLK

GhofraneGSOURI_1-1689256991616.png

Thx

Ghofrane

1 reply

Ghofrane GSOURI
Ghofrane GSOURIBest answer
Technical Moderator
July 13, 2023

Hello @mids400 

First let me thank you for posting.

Based on the RM0385 : The AHB clock (HCKL) is the reference clock for the FMC.

GhofraneGSOURI_0-1689256633091.png

So in order to change the clock frequency you need to change the HCLK

GhofraneGSOURI_1-1689256991616.png

Thx

Ghofrane

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.
mids400Author
Associate III
July 13, 2023

Hello Ghofrane,

Well, i sew that and i have changed it to 200MHz that means now the value of FMC Clock 200MHz. Then i have configured the SDRam Duty 2 Cycle in order to get 100MHz as mentioned in the Datasheet of the Memory.

Its worked now very well. 

Regards,

Mahdi