LPC MicrocontrollersのトピックRe: Plain load image size for LPC54018M

Plain load image size for LPC54018M

rex_lam — Mon, 26 Apr 2021 16:23:57 GMT

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?

Re: Plain load image size for LPC54018M

Alice_Yang — Tue, 27 Apr 2021 10:18:06 GMT

Hello rex_lam,

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

Alice

Re: Plain load image size for LPC54018M

rex_lam — Tue, 27 Apr 2021 14:48:43 GMT

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

Re: Plain load image size for LPC54018M

Alice_Yang — Wed, 28 Apr 2021 09:19:44 GMT

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.

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

Alice

Re: Plain load image size for LPC54018M

rex_lam — Wed, 28 Apr 2021 14:49:23 GMT

Hi Alice,

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

Rex

Re: Plain load image size for LPC54018M

Alice_Yang — Thu, 29 Apr 2021 08:25:29 GMT

YES.

Re: Plain load image size for LPC54018M

rex_lam — Thu, 29 Apr 2021 14:54:04 GMT

Thank you Alice.