topic Re: Read UID LPC15xx via J-Flash in S32K

Read UID LPC15xx via J-Flash

pat_wit — Thu, 09 Sep 2021 14:35:11 GMT

Hi everybody,

i wanted to know if i could read the UID via J-Flash/J-Link by reading a special flash region/address?

I know that it is possible by using IAP. But i want to use the UID do switch between parts in production (blank chip).

Best regards,

Patrick

Re: Read UID LPC15xx via J-Flash

xiangjun_rong — Fri, 10 Sep 2021 01:55:43 GMT

Hi,

As you know that the UID can only be read in ISP or by IAP function, in ISP mode, user can read UID bu uart port or CAN port rather than SWD, the J-link communicates with chip via only SWD. User can read UID with IAP function. The UID is not saved in a memory cell or register, so I suppose that you can not read UID with j-flash/J-link.

Hope it can help you

XiangJun Rong

Re: Read UID LPC15xx via J-Flash

pat_wit — Fri, 10 Sep 2021 06:45:53 GMT

Hi XiangJun Rong,

thanks for the reply.

At those two topics i read that it is possible:

May those are different chips but i think it should also be possible on the LPC15xx

Best regards,

Patrick

Re: Read UID LPC15xx via J-Flash

xiangjun_rong — Fri, 10 Sep 2021 07:31:07 GMT

Hi, Patrick, I agree with you that the UID is saved somewhere, but the address is not open to public, neither reference manual nor data sheet mentions the UID address for the LPC15xx. For the LPC5410x, because the ISP commend has issue, so the errata gives the address of UID. But both RM and data sheet of LPC5410x do not mention the UID address officially. BR XiangJun Rong

Re: Read UID LPC15xx via J-Flash

pat_wit — Fri, 10 Sep 2021 07:39:19 GMT

Hi XiangJun Rong,

thanks for the fast response.

What about the address in the LPC81 topic?

Why is the address of the UID such a mystery?

Best regards,

Patrick