STM32F2xx FSMC interfacing with SDRAM memory

[tomas239955_stm1_st]

Posted on March 22, 2012 at 17:13

Hi,

First of all i know that FSMC in STM32F2xx does not support SDRAM devices. But i think that with little effort it should somehow work reasonably.A good example of how the others try to this is at 

http://www.myplace.nu/avr/dram/index.htm

.A nice explanations can be found at 

http://www.eecs.umich.edu/eecs/courses/eecs373/Lectures/stever_old_lectures/lec9.pdf

Is there somebody who tried to do something anything with an interface to SDRAM on STM32?The main reason why i am over the fact of thinking is that SDRAM is several times cheaper than SRAM. So maybe there already exist some DRAM with interface wich looks like SRAM.So any ideas?Regards,T.Kamenicky #stm32-sdram-fsmc-dram-interface

[Tesla DeLorean]

Posted on March 22, 2012 at 18:06

SDRAM != 1980's DRAM

If you need the cost/performance/size that SDRAM/DDR/DDR2 offers, you need a micro that supports it out of the box. Like the Atmel AT91SAM9xxx or Freescale Kinetis K60 ST's solution is PSRAM, what kind of memory size/cost are you looking for?

[tomas239955_stm1_st]

Posted on March 22, 2012 at 18:46

The PSRAM is quite problem, for example on farnell.com store there is none available :\

Cost should be max 8,-euro and size from 16MbitsAccess time max 1us for 16bits parallel access.

[emalund]

Posted on March 23, 2012 at 14:33

what's the problem?

Mouser has 16MB SRAM @ US$8

[alok472]

Posted on March 24, 2012 at 03:46

''Mouser has 16MB SRAM @ US$8''

Is it MBit or Byte...? We recently used Cellular RAM..works on FSMC on Bank0 (RAM). Still testing it, however no complaints so far. Except the package is BGA