IRQ pin cannot be reset on PN7150 NFC tag reader

[olivierhaas]

Hi NXP experts,

I am actually using an PN7150 NFC tag reader with an µC.

After the initialization the IC works well, but after an ISO15693 the IRQ pin cannot be reset. This signal is always put to high.

Could someone nhelp me please.

Kind regards,

Olivier Haas

[Kan_Li]

Hi Olivier Haas,

The UM says "It may happen that PN7150 has an NCI Message ready to be sent to the DH while it is receiving another NCI Message from the DH. In such a condition, the IRQ pin will be raised somewhere during the Write Sequence: this is not an error and has to be accepted by the DH: once the Write Sequence is completed, the DH has to start a Read Sequence (see →4.4).", please kindly check if that is your issue.

Have a great day,
Kan

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