Revision 2 of the USB board follows the new Butterfly Specification and implements a 16 Cocoon Bus. Most pins from the FTDI2232 are routed to the 16 Bit Cocoon bus to allow more flexible use of the FT2232 chip. A mini-USB footprint is also implemented.
Revision 2 of the S3E board implements SPI flash to save persistent designs and implements a Full Wing for peripherals. The Full Wing is also outlined in the Butterfly Specification.
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