topic Re: Chip Replacement in LPC Microcontrollers

Chip Replacement

HerrPhy — Tue, 01 Sep 2020 04:40:03 GMT

We are now using the LPC11U24FBD48/401 chipset for mass production. Just for a backup, may I ask that is there an alternative chip that can replace it but without changing the firmware.bin?

Thanks very much in advance.

Re: Chip Replacement

HerrPhy — Tue, 01 Sep 2020 04:44:05 GMT

And also we don't wanna change the PCB so it should be a pin-2-pin compatible to LPC11U24FBD48/401

Re: Chip Replacement

xiangjun_rong — Tue, 01 Sep 2020 07:05:59 GMT

Hi, HerrPhy,

Pls download the data sheet of LPC11U2x from the link:

https://www.nxp.com/docs/en/data-sheet/LPC11U2X.pdf

Pls refer to the Fig 4, all the LPC11U22FBD48/301, LPC11U23FBD48/301,LPC11U24FBD48/301, LPC11U24FBD48/401 are pin to pin compatible, but only the memory size are different.

BTW, this is the resource of the chip

Hope it can help you

XiangJun Rong

Re: Chip Replacement

HerrPhy — Tue, 01 Sep 2020 07:09:19 GMT

Thanks for the reply. Can I use other serial like 11U34FBD48/421 or 11U35FBD48/401 to replace the 11U24 serial chip? Are they also binary code compatible?

Re: Chip Replacement

xiangjun_rong — Mon, 07 Sep 2020 02:39:25 GMT

Hi, HerrPhy,

I have compared the pin assignment for the 11U34FBD48/421, 11U35FBD48/401 and LPC11U24FBD48/401, I think the pin assignment are the same, pls check again yourself.

Regarding the "binary code compatible" question, I am sure all of them are binary code compatible, because they use the same core ARM Cortex-M0.

Hope it can help you

XiangJun rong