FMC on STM32F4xx for Graphics Applications

bluephoton928 · ‎2016-01-17

Posted on January 18, 2016 at 00:37

Hellos,

I see there is an inbuiltFMC on the STM32F4x9 MCUs which can interface to various memory types including NAND, NOR , SDR SDRAM. My question is: Is it a good idea to use the NOR or a NAND Flash as a FRAME buffer for graphics applications? If yes, which one of the below is a recommended choice for frame buffer to interface with the FMC.

1. NAND FLash

2.NOR FLash

3. SDR-SDRAM

4. PSRAM

5. 16-bit PC Cards

#graphics

tm3341 · ‎2016-01-18

Posted on January 18, 2016 at 10:54

Use FMC for SDRAM communication (FRAME buffer) and then LTDC for transferring to LCD. The same as F429-Discovery board has.

If you think about LCD as direct memory to STM, check FSMC (not available on F429 which is on Discovery board) but on new F29 versions.

bluephoton928 · ‎2016-01-18

Posted on January 18, 2016 at 17:18

Hey majerle,

Thanks for the reply. I still would like to know if its a good idea to use any of the below as my FRAME Buffer to do graphics. Basically I want to know if Nor Flash and NAND Flash are fast enough to act as a FRAME buffer(which can be interfaced with FMC on a F479) since I can get them at a cheaper price compared to SDRAM.

THanks in advance

Tesla DeLorean · ‎2016-01-18

Posted on January 18, 2016 at 20:04

NAND is not byte addressable memory, it doesn't support the access patterns that you need.

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