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?
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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
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
Thank you Daniel, I've got it.