CLRC633 Interrupt on tag discovery

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CLRC633 Interrupt on tag discovery

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fernandohcoelho
Contributor III

Hello everyone,

I got my new CLRC633 kit and I asked myself... is it possible to make the reader send an interrupt to my MCU when a tag is discovered?

What I'm doing today in my main MCU routine is asking the 633 if there is a tag on field. But this is very time consuming and it is not the syncronized way of doing it. 

Thanks in advance.

F. Coelho

6 Replies

1,110 Views
IvanRuiz
NXP Employee
NXP Employee

Hello,

CLRC663 has an IRQ pin. Please refer to table 5 for the available interrupt sources in the data-sheet:

https://www.nxp.com/docs/en/data-sheet/CLRC663.pdf 

Hope this helps!

Regards,

Ivan.

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1,110 Views
fernandohcoelho
Contributor III

Hello Ivan, how you doing?

I saw all the interrupts available but none of them seems to fit my needs. Interrupt RxSOFIRQ looks like what I need but I'm not sure.

In the datasheet it says RxSOFIRQ will be raise when a SOF or subcarrier is detected. About this, I don't know if the tag, when on the field, starts to send the subcarrier immediately or if it needs a "startup" command, like a REQA for example.

Do you know how this works?

Thanks in advance.

F. Coelho

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1,110 Views
IvanRuiz
NXP Employee
NXP Employee

Hello,

Please let me check this internally.

Regards,

Ivan.

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1,110 Views
fernandohcoelho
Contributor III

Hello Ivan, any news about this question?

Thanks in advance!

F. Coelho

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1,110 Views
IvanRuiz
NXP Employee
NXP Employee

Hello,

Please accept my apologies for the late response. Please see below from APPs team:

This only is raised if a valid answer is coming from the Tag. This means that the Reader needs to perform a command at the begining on which the Card is responding for example a Request.

Regards,

Ivan.

1,110 Views
fernandohcoelho
Contributor III

Thank you Ivan!!! It's always great to have my question answered by the NXP team. I'll try to solve the sync problem with other technics then.

Regards,

F. Coelho

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