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#1 2013-08-20 22:39:18

jonor
Contributor
Registered: 2009-09-17
Posts: 97

RFID ISO14443B with some customizations

I have a RFID ISO14443B compliant to ISO14443B-2 but not full to ISO14443B-3.
The communication PCD->PICC is full ISO14443B-3 NZR, with Start of frame(10 etu 0 + 2 etu 1), start bit (0), end bit(1) and End of frame(10 etu 0).
Communication PICC->PCD BPSK hasn't Start of Frame, has start bit(0), end bit(1), every byte is sepated by 3 bit 1 and 5 pulse on BSPK for data. There is the End of Frame.
Last 2 byte not respect the separation with 3 bit 1 and 5 pulse it should ber CRC_B which is working.

0 | 0 0 0 0 0 1 0 1 | 1 1 1 5 pulse
0 | 1 0 0 1 0 1 0 1 | 1 1 1 5 pulse
0 | 0 0 1 0 0 0 1 0 | 1 1 1 5 pulse
0 | 1 0 0 1 0 0 1 0 | 1 1 1 5 pulse
0 | 0 1 1 0 0 1 0 1 | 1     2 pulse   CRC_B byte 1
0 | 0 0 0 0 0 0 0 1 |       5 pulse   CRC_B byte 2

Is it a custom RFID or there is some standards for it? May be ISO14443B'?

Thank you for your suggestions.

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