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sunstar's avatar
sunstar
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6 months ago

why does the jtag of Agilex™ 7 FPGA I-Series TransceiverSoC Development Kit recognize the wrongFPGA

why does the jtag of Agilex™ 7 FPGA I-Series TransceiverSoC Development Kit recognized the FPGA as AGFB027R24C,but not the AGIB027R31B1E1VB?

5 Replies

    • FvM's avatar
      FvM
      Icon for Super Contributor rankSuper Contributor
      6 months ago
      Hi,
      JTAG ID is unique for FPGA chip, e.g. AGFB027, not for package size.
      • sunstar's avatar
        sunstar
        Icon for New Contributor rankNew Contributor
        6 months ago

        AGFB027 and AGIB027 are not the same fpga chip , AGFB027 is F serial and AGIB027 is I serial , the fpga chip on the Agilex™ 7 FPGA I-Series TransceiverSoC Development Kit is AGIB027,but the jtag recognized as AGFB027.

  • FvM's avatar
    FvM
    Icon for Super Contributor rankSuper Contributor
    6 months ago

    You are right, different chip, I didn't notice. But same JTAG ID according to BSDL files nevertheless, so they can't be distinguished by autodetect, I fear.

    attribute IDCODE_REGISTER of Agilex_AGFB027R24C : entity is
    "0000"& --4-bit Version
    "0011010000111011"& --16-bit Part Number
    "00001101110"& --11-bit Manufacturer's Identity
    "1"; --Mandatory LSB

    attribute IDCODE_REGISTER of Agilex_AGIB027R31B : entity is
    "0000"& --4-bit Version
    "0011010000111011"& --16-bit Part Number
    "00001101110"& --11-bit Manufacturer's Identity
    "1"; --Mandatory LSB

  • WZ2's avatar
    WZ2
    Icon for Frequent Contributor rankFrequent Contributor
    6 months ago

    Hi there,

    The comment above is correct. Since the JTAG ID of the device is not unique, many devices in Quartus share the same JTAG ID. Therefore, during auto-detection, Quartus will default to selecting the first matching device from the list.

    Of course, this behavior will not affect your usage.

    Best regards,

    WZ