New SDRAM on IMXRT1170

[ahmedhrabi]

Hello,

I am working on the RT1170 EVK, and I want to change the SDRAM memory. The operating mode is XIP in an MCUXpresso project. I have found little support on how to do this, and here is the question I have:

Is changing the configuration in the DCD file (dcd.c) sufficient to use a new SDRAM memory?

Thank you.

[Alex-APMemory]

FYI, if you are planning to change SDRAM, I'm not sure what is the driver for your plan, but you can use Octal PSRAM instead of legacy SDRAM. This would support the same bandwidth with much lower pin count and power.

For testing purpose on the RT1170 EVK, you can use U21 BGA24 slot from MXIC Octal NOR Flash (MX25UM51345G). Many Octal PSRAM option are possible such as 64Mb APS6408L-OBM-BA, 128Mb APS12808L-OBM-BA, APS25608N-OBR-BD, 512Mb APS51208N-OBR-BD.

Alex

[Omar_Anguiano · Accepted solution]

Hello

Yes, the DCD allows you to configure your SDRAM as it writes to the SEMC registers needed to set your memory. You can configure your SDRAM in code based on the semc example however if you want to execute from SDRAM it needs to be set through the DCD.

Best regards,
Omar