topic Re: NTAG 424 ACCES RIGHTS in NXP Designs

NTAG 424 ACCES RIGHTS

kicedric78 — Mon, 05 Oct 2020 12:00:30 GMT

Hello, how are you? what are the definitions of the different access rights (0E, 01,02,03,04,0F)

Re: NTAG 424 ACCES RIGHTS

Jonathan_Iglesias — Mon, 05 Oct 2020 14:59:03 GMT

the access rights basically have 3 different meanings:

if you put 00,01,02,03,04 it means that operation can be done by the key number you select, for example if you have for read access:04 it means that in order to read that file you need to be authenticated with key 04.

if you put 0E, it means free access, again if you put this for read access, again for example in read access if you put 0E it means you do not need to be authenticated in order to read the file.

and 0F is the opposite of 0E, 0F means that there is no access.

and they key access set are :

Read,Write, Read/Write, change.

this can be found in section 8.2.3.3 of the DS https://www.nxp.com/docs/en/data-sheet/NT4H2421Gx.pdf

Jonathan

Re: NTAG 424 ACCES RIGHTS

kicedric78 — Mon, 05 Oct 2020 16:59:14 GMT

Thank you, I understand better, but I still cannot read the tag with my phone (tagWritter with samsung s5), the read access key being on 0E, should I do other additional configurations?

Re: NTAG 424 ACCES RIGHTS

kicedric78 — Tue, 06 Oct 2020 09:18:43 GMT

Note, the tag is not detected by my phone, are there other configurations so that the tag can be read by a phone (TagWritter)? I took care to set the right access to 0E and write an NDEF message (text)