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‘Supersizing’ the Feather M0 Express with 8MB SPI Flash Memory (S25FL064L )

Thanks to Dave Astels aka CURMUDGEOCLAST for sharing this handy hack for swapping out the 2MB SPI Flash IC with an 8MB version from Cypress:

Replacing the 2Mbyte SPI flash chip with an 8Mbyte version was easy: I used a solderwick to remove the bulk of the solder on and around the pins, then gently pulled/pried the chip off while heating the pins (one side at a time). Then I put a bit of solder on opposite corner pins and used that to tack the new 8Mbyte chip onto the board. Be careful orient the chip correctly! To finish I soldered each other pin to the board. Done.

The one thing that took a bit of effort up front was finding a larger flash ship that was physically and functionally compatible. I found the S25FL064L. This is a hardware drop in replacement with 4 times the space. The chip is physically bigger as well, but still fits the 8-SOIC footprint and pads.

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