If you consider µCs to be incapable of any “serious” data handling, then you’ll be in for a treat.
The following design was created for an upcoming project, which needs a fairly high-speed path for handling requests and transferring 512-byte blocks of data to and from an SD card.
One option is to act as a slave-side SPI device. Here’s how SPI works, courtesy of Wikipedia:
Note that the master drives the clock which causes both shift registers to exchange each bit.
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