How many Mb for NOR/NAND Flash can use with STM32F746ZG Quad-Spi?

[NakornThree]

Posted on August 06, 2017 at 07:12

Hi all. I'm newbies for STM32F7xxx. How many Mb for NOR/NAND Flash can use with STM32F746ZG, Quad-SPI? Thank you.

#NOR/NAND Flash Q-SPI

[S.Ma]

Posted on August 06, 2017 at 11:26

Hmm on the discovery the serial flash is fixed and sdio signals may not be accessible to plug other memories. For the chip itself, i guess that any size would work as the commands pass a 32 bit base address. Compared to usdcard qspi hw maps the serial memory within the stm32 memory space in read mode, enabling full hw management, xip and dma, dma2d access.

[Tesla DeLorean]

Posted on August 06, 2017 at 15:19

As I recall the decode window is 256MB (0x10000000). The limit on QSPI is no doubt in one of the manuals, and likely comes from either the address/command sequence used, or the address constraint just mentioned.

NAND only needs a few address lines, it behaves like a hard drive or mass storage device, so hundreds of GB, accessed via a window, and not providing execute-in-place.

[NakornThree]

Posted on August 09, 2017 at 05:10

Thank you

[Amel NASRI]

Posted on August 14, 2017 at 12:39

Hi

Threesinghawong.Nako

‌,

You may find the answer to your question with more further details on how to use Q-SPI on

http://www.st.com/content/ccc/resource/technical/document/application_note/group0/b0/7e/46/a8/5e/c1/48/01/DM00227538/files/DM002275pdf/jcr:content/translations/en.DM002275pdf

:

-Amel