Multiple SDRAM chip support

paulnichols — Fri, 16 Mar 2018 23:36:03 GMT

Can multiple SDRAM chips be added to the RT1050 (eg: MIMXRT1051DVL6A) external memory interface to expand the amount of addressable RAM? For my application I am needing at least 64MB of RAM and to make this cost effective is seems 2 x 32MB (16MB x 16 bit width) chips would be best.

From the datasheet it seems possible using multiple CS line but the following statement from a supporting RT1050 introduction slide deck (page 17 - https://www.nxp.com/docs/en/supporting-information/i.MX-RT1050-Supporting-Inf.pdf) seems to indicate support for only a single 16 bit width DRAM is possible.

"Support single x16 DRAM chip or dual x8 DRAM chip"

Just needing to confirm I can achieve 64MB (or even 96MB) of extern SDRAM on this platform.

Thanks

Re: Multiple SDRAM chip support

Yuri — Mon, 19 Mar 2018 09:08:43 GMT

Hello,

According to i.MX RT1050 Reference Manual its memory controller SEMC supports

SDRAM interface with the following features:

• 8/16 bit modes;

• Up to 512Mb per each Chip Select (CS) and up to 4 CS.

Have a great day,
Yuri

-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

topic Re: Multiple SDRAM chip support in i.MX Processors

Multiple SDRAM chip support

Re: Multiple SDRAM chip support