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STM32F723 FMC SDRAM

CObri.1
Associate III

Hi there,

We use a STM32F723 controller and want to connect two external RAM devices.
Now we have to select a RAM that fits to the FMC. What we can't find in the reference manual RM0431 is, if SDRAM-DDR functionality is provided or only SDRAM without DDR.

Does anyone have experience with the FMC connecting SDRAM and can tell us which SDRAM (DDR or no DDR) we can use?

Best regards,
Corsin

1 ACCEPTED SOLUTION

Accepted Solutions

Only supports SDR, so notionally PC100, or PC133/PC166 at derated speeds. DDR is not supported. The SDRAM can run at 1/2 or 1/3 of the AHB clocks

Supports 16 or 32-bit wide interfacing, 4-Banks.

For examples of used/usable SDRAM devices look at schematics/bom for DISCO and EVAL boards, will be under the "CAD Resources"

The DM and RM would be worth a read also.

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View solution in original post

2 REPLIES 2
KDJEM.1
ST Employee

Hello @CObri.1 ,

It is mentioned in RM0431 section SDRAM controller functional description "All SDRAM controller outputs (signals, address and data) change on the falling edge of the memory clock (FMC_SDCLK)." 

Thank you for your contribution.

Kaouthar

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.

Only supports SDR, so notionally PC100, or PC133/PC166 at derated speeds. DDR is not supported. The SDRAM can run at 1/2 or 1/3 of the AHB clocks

Supports 16 or 32-bit wide interfacing, 4-Banks.

For examples of used/usable SDRAM devices look at schematics/bom for DISCO and EVAL boards, will be under the "CAD Resources"

The DM and RM would be worth a read also.

Tips, Buy me a coffee, or three.. PayPal Venmo
Up vote any posts that you find helpful, it shows what's working..