How to detect if NFC chip is powered or not?

zeuschyant88 — Thu, 02 Sep 2021 12:55:18 GMT

I'm using NT3H2111 NTAG I2C Plus 2k NFC chip in my product.

On the NFC side, I've developed an app and there is data transfer between the NFC chip and the app.

Now my application also demands reading and writing data to NFC chip from the app while the product is OFF. This works, because NFC chips can also work on passive power coming from phone's NFC transmitter.

However, if the product is powered OFF, I need to convey so on the mobile app and modify its user interface.

So is there a way to detect if NFC chip is actively powered or not?

Any register bit I can read from the NFC side which will have this information?

Re: How to detect if NFC chip is powered or not?

Frzn_Solid — Wed, 19 Jun 2024 19:52:26 GMT

I believe you can use the SRAM_MIRROR_ON_OFF bit to detect when the product is off, as it is cleared automatically when there is no Vcc power

topic How to detect if NFC chip is powered or not? in NFC

How to detect if NFC chip is powered or not?

Re: How to detect if NFC chip is powered or not?