STM32F4 FSMC interfacing with SDRAM

itanium7000 · ‎2013-10-02

Posted on October 03, 2013 at 05:35

Hi,

I kwow STM32F4 support FSMC interface with LCD, FLASH...and SRAM/SDRAM...I have some example FSMC with LCD, SRAM but I don't kwow how to interface and control SDRAM. Can anyone show me an example (schematic, principles...) of STM32F4 FSMC interfacing with SDRAM?

Thanks in advanced!

#sdram #sdram-stm32f429-disco-expansion #stm32f407

waclawek.jan · ‎2015-04-24

Posted on April 24, 2015 at 15:08

> Is it possible to attach that SDRAM to the FSMC

No (if you don't mind that I am not Clive).

Read the fine manual, focus on FSMC vs. FMC.

JW

stst9192 · ‎2015-04-28

Posted on April 28, 2015 at 17:29

Jan,

thx a lot. I had not realised that from my mind...

I have a SSD1963 connected to my STM32F407VGT6 in 16bit multiplexed mode.

Now I wonder how to connect this external RAM in same mode to my uC:

http://www.issi.com/WW/pdf/61WV102416ALL.pdf

There are not so many fast SRAMS around...

If someone had done that before and could give me some hints - fine ;o).

Best, tom.

waclawek.jan · ‎2015-04-28

Posted on April 28, 2015 at 17:38

You'll need to demultiplex the address lines for the SRAM, namely latch the lower addresses e.g. into a pair of 74HC573 or similar, driven by NADV. The rest of connections (NOE, NWE, higher address, data) are connected 1:1 between the mcu and memory.

You might want to start a new thread if you want to discuss this further.

JW

sprhawk · ‎2015-10-18

Posted on October 19, 2015 at 05:53

F407 only have FSMC, it cannot interface with SDRAM,

F42x have FMC, which can interface with SDRAM

See Reference Manual for F4xx, or data sheet for F4xx.

Or you can use FSMC with a PSRAM