MFRC630 Anti-Collision Cycle Issue

Forum / MIFARE and NFC Reader IC`s / MFRC630 Anti-Collision Cycle Issue


  • 19. June 2019 at 13:08

    I'm writing firmware to drive an MFRC630 chip.

    So far, I've got the REQA/WUPA routine down--when I present an NFC tag to the reader:
    MCU sends 26H and get 44H 00H back.
    MCU sends 52H and get 44H 00H back.

    Then, during the first anti-collision cycle, something goes wrong:
    MCU sends 93H 20H and get 20H 00H 00H 00H 00H back (instead of 20H SN0 SN1 SN2 BCC0), where SN1, SN2, and SN3 shouldn't be non-zero values.

    Does anyone have any idea why this might happen? Any advice would help.

    Kind regards,

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    Re: MFRC630 Anti-Collision Cycle Issue

    19. June 2019 at 13:09
    My apologies. In the original post, I meant "SN1, SN2, and SN3 should be non-zero values." Not shouldn't.
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