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Altera_Forum's avatar
Altera_Forum
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15 years ago

2-3 configuration images for a single CIII

Hi, I have a question regarding configuration flashes.

I'm using a CIII platform and trying to save in cost by using the smallest device applicable, of course. My system has different modes of operation that don't really interact and creating all capability inside the FPGA with many switches demands a largish device as well. So, I'm wondering if I could simply use 2-3 configuration devices (M25P16) in parallel to pull the correct config for the current mode of operation. I would control some chip-select-mux via MCU and use nConfig to reconfigure depending on the required mode. In theory, this would hugely save in fpga-cost.

Is this ok? Can it be done ?

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    You should also learn about the altremote_upgrade Megafunction, that basically allows to switch between different configurations stored in a single configuration device.

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    As you have a MCU you could use Passive Serial configuration and keep the 2 - 3 logic images in the Serial Data Flash connected to the MCU. At the same time making an additional saving as you now only need 1 SDF.