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cstocks
Associate II
June 15, 2026
Solved

STM32F427 DMA2D FIFO Size

  • June 15, 2026
  • 7 replies
  • 138 views

What are the sizes and configurations of the FIFOs (foreground, background, and out) on the STM32F427 DMA2D (Chrom-Art)?

Best answer by mƎALLEm

This is the answer from our expert:

The DMA2D FIFOs are 35 bytes long and are handling 8x32 bursts transactions.
The 3 FIFOs are on the same master port so no concurrent operations this means that the output FIFO can not be drained when in put FIFOs are refilling.

Hope that helps.

7 replies

mƎALLEm
mƎALLEm
ST Technical Moderator
June 15, 2026

Hello ​@cstocks and welcome to the ST community,

Could you please clarify what is the purpose of this question? and what do you need such kind of data?

If the data is not available in the documentation/user manual I don't think we can provide a such information as it could be a confidential data.

For more information you can also refer to the AN4943 “How to use Chrom-ART Accelerator to refresh an LCD-TFT display on STM32 MCUs”

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    cstocksAuthor
    Associate II
    June 15, 2026

    I’m trying to use the DMA2D with the FMC and a timer configured to generate wait states to write precisely timed data to a parallel DAC.  Knowing the size of the FIFOs would give an indication of how long other operations can take without interrupting the output data stream.

    mƎALLEm
    mƎALLEm
    ST Technical Moderator
    June 15, 2026

    I will ask the question internally but I’m not sure I’ll get the full information. This also will take time.

    Internal ticket for follow-up: CDM0063529

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