SD Card on a Chip!

We saw a tweet from @GregDavill a few weeks ago about these neat ‘SD Card on a Chip’ devices and decided to pick some up. They work great! Note that this is NOT an SPI NOR flash chip, it emulates the SD Card block-based interface. This particular model is 512MB and has SOIC-compatible packaging. After soldering to a breakout, we ran Arduino SDFat on a Feather M4 wired up to it and it shows up as a FAT16-formatted drive! You can use these in SPI or SDIO mode. We’re going to make a quickly level-shifted breakout for this chip so you can use it safely with 3V or 5V logic. Great for when you want a ton of storage, with a well supported API, and want the size or mechanical benefits of an SMT component – video.

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