Have a great day,
Yes you can have multiple devices connected to the eLBC bus; these devices may share the address/data/controls lines and selected by different chips selects. I do not see what processor and FPGAs you want to connect. So I could not be sure for the reference design. There are reference designs for processor with eLBC which have FPGA and NOR/NAND flashes connected to the eLBC.
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