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rshal2's avatar
rshal2
Icon for Occasional Contributor rankOccasional Contributor
6 years ago

bootselect pins confusion

Hello, I am a bit confused with bootselect pins on arria V. According to table A-1 from Arria V Device Handbook: 0x0 Reserved 0x1 FPGA (HPS-to-FPGA bridge) 0x2 1.8 V NAND flash memory 0x3 3.0 ...
sstrell's avatar
sstrell
Icon for Super Contributor rankSuper Contributor
6 years ago

I think those names are the functions of the pins after boot (for example NAND_WE is NAND write enable) or if you're not using them for boot select. The 3 pins still use the BSEL encoding from the handbook.

#iwork4intel

  • rshal2's avatar
    rshal2
    Icon for Occasional Contributor rankOccasional Contributor
    6 years ago

    Thanks,

    But I find it a bit strange, if they are boot selects pins, it means that they are connected to '0' or '1', not to other device.

    So, how can such pin have both roles ?

    Thanks

    • EBERLAZARE_I_Intel's avatar
      EBERLAZARE_I_Intel
      Icon for Regular Contributor rankRegular Contributor
      6 years ago

      Hi,

      I do not really get the question, correct me if I am wrong are you asking why there are two boot select pins for NAND devices?

    • EBERLAZARE_I_Intel's avatar
      EBERLAZARE_I_Intel
      Icon for Regular Contributor rankRegular Contributor
      6 years ago

      Hi,

      Do you have any followup from your side?

      Regards.