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A MAX II CPLD plus a QSPI flash can easily operate at 12MHz, this means with FPP mode, there is no problem meeting the power-on requirement.
MAX II CPLD EPM240M100C5N $6
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I was considering that possibility.
MAX II CPLD with PFL inside / QSPI flash / PS mode for EP4CGX22 / Configuration mode only won't fit into EPM240M100C5N.
EPM540M100C5N @ 13.5 USD has to be used ...
A more comfortable Configuration + Programming mode won't fit even into EPM540M100C5N.
EPM2210 @ ~30 USD has to be used ...
Are You sure, that PFL input Clock = 12MHz clock is enough for MAX II to configure EP4CGX22 from a single Quad SPI ( N25Q128A13ESE40G ) in PS within below 50 ms ( as a conservative approach )?
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