The USB transfer rates are incredible with this device. You can transfer gcode files to the uSD card reasonably quick to make it a useful feature. As opposed to going through the FTDI USB serial interface. At 8Mbps (about) the transfers don't take long and downloading an image to the device is very quick. I like that controller a lot and it is in a good range of my devices. The u32 is also one of my favourites.
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