Detect external NFC antenna connected to CR95HF.

Hi,

We are using NFC reader IC: CR95HF using uart communication with our micro-controller.

We are using external antenna for antenna, Is there any way to detect NFC antenna is connected to CR95HF ?

Thank you in advance,

Jignesh Patel

This topic has been closed for replies.

Best answer by Brian TIDAL

Hi Jignesh,

Depending on your application, I would see several way for checking that the antenna is functional.

use the Pollfield command and check the result code when the CR95HF is in the operating field of another reader. See §5.5 in the datasheet.
use the TagDetection calibration procedure: when the antenna is disconnected/broken, the calibration value should be highly different from the one in nominal condition. See §5.9 in the datasheet.
add a field detector (see https://www.youtube.com/watch?v=dTv4U5fotM0), switch on the field and check that the field is present.

Rgds

BT

Technical Moderator

Hi,

can you elaborate on your need:

Rgds

BT

Visitor II

Hi Brian TIDAL,

It is for integration of system check during lifetime of product.

Regards,

Jignesh Patel

Technical Moderator

Hi Jignesh,

Depending on your application, I would see several way for checking that the antenna is functional.

use the Pollfield command and check the result code when the CR95HF is in the operating field of another reader. See §5.5 in the datasheet.
use the TagDetection calibration procedure: when the antenna is disconnected/broken, the calibration value should be highly different from the one in nominal condition. See §5.9 in the datasheet.
add a field detector (see https://www.youtube.com/watch?v=dTv4U5fotM0), switch on the field and check that the field is present.

Rgds

BT

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