Plain load image size for LPC54018M

[rex_lam]

The LPC54S018J4M MCU has 192K SRAMX and 4MB spifi flash. Is the maximum plain load image size restricted by the size of the SRAMX, i.e. 192K for LPC54S018J4M?

[Alice_Yang]

Hello Rex,

This is depends on how config in your IDE or linker file, for example MCUXpresso IDE, when do NOT enable "Plain load image",

it will flash XIP.

Alice_Yang_0-1619601513936.png

You can open the demos "hello world" and "hello world xip" under SDK  to check the difference. 

BR

Alice

[rex_lam]

Hi Alice,

Let's assume that I want to enable "plain load image". Is the maximum firmware image size then restricted to 192K?

Rex

[Alice_Yang · Accepted solution]

YES.

[rex_lam]

Thank you Alice.

[Alice_Yang]

Hello rex_lam,

No, you can directly  Execute in place from spifi flash.

BR

Alice

[rex_lam]

Alice,

Thank you for responding. To clarify, do you mean that the first 192K will execute from SRAMX and the higher addresses of the firmware image will execute in place from spifi flash? Is this the default behavior for plain load image?

Rex