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JArti2's avatar
JArti2
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5 years ago

Configuration Flash Memory For Cyclone IV E - Military Grade?

I'm designing a military application using a Cyclone IV E device (EP4CE55F23A7N - automotive grade), but can't seem to locate an automotive grade configuration flash memory chip. I need one that goes up to at least 125 degrees C, and I want to us Active Serial AS Mode. Do you have, or can you please recommend, a part for the task? This is a requirement by the Military so any help, part number, etc, that you can provide will be greatly appreciated!

Thanks!

19 Replies

  • JArti2's avatar
    JArti2
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    This is the way I did it with Intel flash memory, and I want to do something similar with Micron flash (please see attached image).

    I use an AS module in the FPGA, and program the flash through that. I then convert my programming files to .jic, and program the flash.

  • JohnT_Altera's avatar
    JohnT_Altera
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    Hi,

    For the connection in blue it s as below.

    RESET# - Weak-pull high.

    HOLD# - Weak-pull hig.

    W# - Weak-pull high

    DNU - floating

    RFU - floating

    NC - floating

  • JArti2's avatar
    JArti2
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    Hi JohnT,

    That is exactly what I needed!

    Thank you for that!

    I have one other thing to ask, and that is what to do with all the RFU_1 - RFU_14 (please see the attached image)

    Also, does everything look right in the schematic I attached, mainly the connections to the FPGA?

    Thanks again for all your help!

  • JohnT_Altera's avatar
    JohnT_Altera
    Icon for Regular Contributor rankRegular Contributor

    Hi,

    The connection to the FPGA looks fine for me. I would recommend you to connect the RESET# of the flash to weak-pull up to avoid it entering reset state.

  • JArti2's avatar
    JArti2
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    Thanks JohnT, truly appreciate all your help here.

    Got, I will add the weak pull-ups on the flash.

    So I have the correct flash pins matched up to the correct pins of the fpga?

  • JArti2's avatar
    JArti2
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    Can you please look at the attached schematic and let me know if this looks complete?