STM32F723 FMC SDRAM

[CObri.1]

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

[KDJEM.1]

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

[Tesla DeLorean · Accepted solution]

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.