MFRC522 NRSTPD

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MFRC522 NRSTPD

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tjf
Contributor I

Hi

I do not have a free I/O pin for NRSTPD on my host interface.

Can I leave it open (prefered) or connect to 3.3V ? What are the consequences?

Best regards

Thomas

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1 Reply

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weidong_sun
NXP TechSupport
NXP TechSupport

Hello Thomas,

    The pin should be pulled up to HIGH, because LOW means power down. like this:

pastedImage_1.png

Best Regards,

Weidong

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