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Tal.Ram
Visitor II
August 8, 2018
Solved

CR95HF UART timing

  • August 8, 2018
  • 1 reply
  • 659 views

Hi,

couple of questions-

  1. how long it takes from where the CR95HF reads the data correctly until it sends the data to the MCU (over UART)? let's say it's 10 Bytes user data.
  2. when reading multiple blocks- does the CR95HF read single block by single block and then send the whole data or in other way?

Thanks

    This topic has been closed for replies.
    Best answer by Peter Boringer

    Hello,

    1. As soon as the CR95HF read the tag the datas are available so you can poll via UART you will receive the answer to your command or an error flag . (The CR95HF internal buffer is 528Bytes, and CR95HF UART interface is slave.) Please check the datasheet: https://www.st.com/resource/en/datasheet/cr95hf.pdf sheet 11
    2. Assuming you are using a type V (ISO15693) protocol the CR95HF will provide 4 blocks (16 Bytes) after a read multiple block command.

    Regards

    PB

    1 reply

    P
    Peter BoringerAnswer
    Visitor II
    August 22, 2018

    Hello,

    1. As soon as the CR95HF read the tag the datas are available so you can poll via UART you will receive the answer to your command or an error flag . (The CR95HF internal buffer is 528Bytes, and CR95HF UART interface is slave.) Please check the datasheet: https://www.st.com/resource/en/datasheet/cr95hf.pdf sheet 11
    2. Assuming you are using a type V (ISO15693) protocol the CR95HF will provide 4 blocks (16 Bytes) after a read multiple block command.

    Regards

    PB

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