FT221XQ-x spi equivalent, usb 8-bit spi.
* Single chip USB to 1, 2, 4, or 8 bit wide
synchronous interface.
*
*.
* Entire USB protocol handled on the chip. No
* USB specific firmware pr.
* Upgrading Legacy Peripherals to USB
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* Utilising USB to add system modularity
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* Incorporat.
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