topic Chip_IAP_ReadUID in LPC Microcontrollers

Chip_IAP_ReadUID

chucktian — Fri, 12 May 2017 23:17:31 GMT

I am working on LPC54114. I tried to use Chip_IAP_ReadUID to get a unique ID for USB detection. However, I only got {0, 65535, 0, 0} from the result. I assume it should be a unique random number from manufacture process. BTW, Chip_IAP_ReadPID works fine for me. So it doesn't make sense why ReadUID is not working. Anyone can help? Thanks a lot.

Re: Chip_IAP_ReadUID

jeremyzhou — Thu, 18 May 2017 07:34:38 GMT

Hi Chuck Tian,

Thank you for your interest in NXP Semiconductor products and

the opportunity to serve you.

I was wondering if you can share the demo, and then I can replicate the issue on LPCXpresso LPC54114.

Have a great day,

TIC

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Re: Chip_IAP_ReadUID

ckphua — Fri, 19 May 2017 19:34:07 GMT

This is a known issue and documented in the LPC5411x Errata sheet.

Here's the workaround:-

The unique serial number (four 32-bit words) can be directly read from address locations

0x0100 0100 to 0x0100 010C