The ATBTLC1000-XPRO-ADPT is an adapter board for the ATBTLC1000-XPRO expansion board. It is required for the UART hardware flow control functionality to operate correctly when the ATBTLC1000-XPRO expansion board is connected to certain Xplained MCU base boards.
The BTLC1000XPRO-ADP adapter board supports the SMART SAM L21 Xplained Pro, SAM D21 Xplained Pro, SAM 4S Xplained Pro and SAM G55 Xplained Pro boards.