AUG-3.1-512K-1MHz : RTS/CTS data flow between UART is not managed. Works with DPRAM less than 512 word16, must be used with UFP LIB <= V10
AUG-4.1-512K-1MHz : RTS/CTS data flow between UART is managed. Works with all DPRAM sizes, must be used with UFP LIB >= V11