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omeryaman
omeryaman
Associate II
April 8, 2018
Solved

Missing SDRAM choice in STM32Cube for 100 pin package

  • April 8, 2018
  • 6 replies
  • 2155 views
Posted on April 08, 2018 at 12:45

Hello everyone,

I want to use 100pin STM32F446 or STM32F722 microcontroller to drive an SDRAM. Bu in STM32Cube it doesn't have an SDRAM choice in FMC peripheral. When i select a 144pin version of these microcontrollers the SDRAM choice appears in STM32Cube.  So do i have to use a 144pin package to drive an SDRAM in FMC module instead of 100 pinned one

#sdram #fmc #stm32f4 #stm32cube #stm32f7
This topic has been closed for replies.
Best answer by Tesla DeLorean
Posted on April 08, 2018 at 17:47

It is a function of pin availability, SDRAM uses a lot of pins, and there are limited AF mux options, take a high-light marker and draw across the rows/columns of the 100pin device and SDRAM pins, this should indicate if the part choice is workable.

If the 144-pin LQFP is too large, consider the UFBGA packages

6 replies

Tilen MAJERLE
Tilen MAJERLE
ST Employee
April 8, 2018
Posted on April 08, 2018 at 13:15

STM32F722 does not have all GPIO pins available for SDRAM.

omeryaman
omeryamanAuthor
Associate II
April 8, 2018
Posted on April 08, 2018 at 13:25

So do i have to use 144pinned version instead of 100pinned one?

Tesla DeLorean
Tesla DeLorean
Guru
April 8, 2018
Posted on April 08, 2018 at 14:42

If you review the parts data sheet you should be able to confirm this yourself. Might be an important thing to start with if you are designing a board.

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