One-time NFC program downloader.

[gpol2003]

Hi everyone,

I'm working on a project with the NHS3100, where the device should not be constantly powered. The goal is for it to read the temperature from its sensor and expose it as a parameter in a URL, which will be published on the NFC tag.

I successfully uploaded the code using J-Link in MCUXpresso, and everything works perfectly. However, when I upload the code using the NHS31xx NFC Program Loader, the code uploads fine, but my phone no longer reads the tag unless the tag is externally powered.

What configuration do I need to enable the NFC tag to be powered through NFC after uploading the code via NFC Program Loader?

Any help would be greatly appreciated!

[Fabian_R]

Hello, my name is Fabian, I've been assigned to support your case.

Thank you for your interest in our products

The NHS3100 has a VNFC which is a power input selector that is in charge of selecting the switch that fulfills the PMU requirements.

For further information please take a look at section 8.4.1 System power architecture where the VNFC and NFC Power Switch (PSWNFC) are explained and shown in a diagram.

Please also take a look at UM10876 5.4 System power architecture where the power configurations and, sequences are also described.