RF430FRL154 Patch

marco barosso

Other Parts Discussed in Thread: TRF7970A

Hi, I've done the patch with the RF430FRL154 micro, but it works well with S4 SAMSUNG phone, but if I use S6 Samsung phone, it doesn't work.

The patch doesn't use a battery, the power is supplied by NFC field.

The phone doesn't read the patch. Is it a field problem? Someone knows something?

Now I try to use other phones. Thanks.

over 7 years ago

0 Katie Pier over 7 years ago

TI__Guru 68116 points

Hi Marco,
I'm moving this to the NFC/RFID forum.
-Katie

0 Alex K. over 7 years ago

TI__Expert 7820 points

If your patch works on one handset and not another, it may be that it is taking too long to respond to the command (I am assuming that you created a custom command). The ISO15693 response time is about ~320uS. Some NFC readers are strict on this timing and other ones are not.
To confirm this, you would need a ISO15693 sniffer. The TRF7970AEVM with a logic analyzer could be used to do this. Let me know if you would like to try this and I can send you the firmware to program the TRF7970AEVM to act as an ISO15693 sniffer.

0 marco barosso over 7 years ago in reply to Alex K.

Prodigy 100 points

Thanks, If you can, send me the program. My e-mail is elettronica3m@libero.it.

Thanks again.

0 Alex K. over 7 years ago in reply to marco barosso

TI__Expert 7820 points

I am attaching a CCS project that has to be programmed into the TRF7970AEVM.

/cfs-file/__key/communityserver-discussions-components-files/667/Sniff_5F00_TRF7970AEVM.zip

The EVM then needs to be placed either outside or between the two communicating boards.

The demodulated signal is available on pin SOMI from the TRF7970A (check the header on the board, you may need to solder a jumper to connect to it).

For your case, you need to see the command and the response time. You don't need to decode the signals. But you could do that if necessary, manually.

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RF430FRL154 Patch