Can NHS3100'firmware be initialized without battery?

[preenness]

I get "download error" message at the same point (a few seconds after the downloading starts) everytime . Is it beacuse of the absece of battery?

[danielchen · Accepted solution]

Hi Preenness:

All NHS31XX ICs support both wired and wireless flashing to store the firmware in the non-volatile FLASH memory.  Wired flashing uses the JTAG standard over the 2-pin electrical interface SWD. Wireless flashing uses the NDEF protocol over the NFC interface.

Wireless flashing requires a low-ohmic external supply connected to VBAT, Flashing is not possible on VNFC supply only.

Please refer to AN 12328 for more details.

Regards

Daniel

[preenness]

Thank you Daniel, I've got it.