https://community.nxp.com/t5/MCX-Microcontrollers/How-to-use-an-m-sramx-memory-region/m-p/2408646#M5837 <P>Hi NXP team,</P><P>I am using MCXN547 with MCUXpresso SDK and noticed that the linker script defines an m_sramx memory region.</P><P>Could you clarify how this memory region is intended to be used? Specifically:</P><OL><LI>Do variables need to be explicitly placed into the m_sramx section using a compiler attribute or section macro?</LI><LI>Or will the linker automatically place variables into m_sramx when the default SRAM region becomes full?</LI><LI>Is m_sramx suitable for large DMA buffers or eDMA TCD pools? Are there any cache, bus-access, or performance considerations when using it with DMA?</LI></OL><P>I would appreciate an example of how to place a buffer in m_sramx in an MCUXpresso SDK project.</P><P>Thank you.</P> Thu, 27 Aug 2026 02:31:10 GMT george_from_hyn 2026-08-27T02:31:10Z https://community.nxp.com/t5/MCX-Microcontrollers/How-to-use-an-m-sramx-memory-region/m-p/2408646#M5837 <P>Hi NXP team,</P><P>I am using MCXN547 with MCUXpresso SDK and noticed that the linker script defines an m_sramx memory region.</P><P>Could you clarify how this memory region is intended to be used? Specifically:</P><OL><LI>Do variables need to be explicitly placed into the m_sramx section using a compiler attribute or section macro?</LI><LI>Or will the linker automatically place variables into m_sramx when the default SRAM region becomes full?</LI><LI>Is m_sramx suitable for large DMA buffers or eDMA TCD pools? Are there any cache, bus-access, or performance considerations when using it with DMA?</LI></OL><P>I would appreciate an example of how to place a buffer in m_sramx in an MCUXpresso SDK project.</P><P>Thank you.</P> Thu, 27 Aug 2026 02:31:10 GMT https://community.nxp.com/t5/MCX-Microcontrollers/How-to-use-an-m-sramx-memory-region/m-p/2408646#M5837 george_from_hyn 2026-08-27T02:31:10Z https://community.nxp.com/t5/MCX-Microcontrollers/How-to-use-an-m-sramx-memory-region/m-p/2410341#M5886 <P><BR /><A href="https://shequ.docin.com/app/shequ/themeview?tid=3179907" target="_blank">https://shequ.docin.com/app/shequ/themeview?tid=3179907</A><BR /><A href="https://shequ.docin.com/app/shequ/themeview?tid=3179910" target="_blank">https://shequ.docin.com/app/shequ/themeview?tid=3179910</A><BR /><A href="https://shequ.docin.com/app/shequ/themeview?tid=3179911" target="_blank">https://shequ.docin.com/app/shequ/themeview?tid=3179911</A><BR /><A 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href="https://shequ.docin.com/app/shequ/themeview?tid=3179975" target="_blank">https://shequ.docin.com/app/shequ/themeview?tid=3179975</A><BR /><A href="https://shequ.docin.com/app/shequ/themeview?tid=3179976" target="_blank">https://shequ.docin.com/app/shequ/themeview?tid=3179976</A><BR /><A href="https://shequ.docin.com/app/shequ/themeview?tid=3179979" target="_blank">https://shequ.docin.com/app/shequ/themeview?tid=3179979</A><BR /><A href="https://shequ.docin.com/app/shequ/themeview?tid=3179981" target="_blank">https://shequ.docin.com/app/shequ/themeview?tid=3179981</A></P> Wed, 02 Sep 2026 07:09:04 GMT https://community.nxp.com/t5/MCX-Microcontrollers/How-to-use-an-m-sramx-memory-region/m-p/2410341#M5886 hao520 2026-09-02T07:09:04Z