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  • I guess, not much can be said as the issue seems to be solved so will just comment this

    If you need fast RAM to store live pages it could be worth checking at FRAM modules such as this one:

    There is also quite cheap SPI RAM, e.g. 8 megabytes for <$1­56594.html

    The commands and pinout are exactly the same as with SPI flash, it is just that the storage is volatile. So may be useful for some cases. One can even put RAM chip on top of Flash chip and have just different CS pin (picture here). Disadvantage of such RAM is power draw - 400uA to keep the data, miliamps to read/write.