3.2 Xplained Pro Connections
Some Microchip development boards support only the Xplained Pro extension headers. Through use of an adapter board, the 3-lead Contact socket board can still be used. Figure 3-1 shows the full assembly of the 3-lead Contact socket board, the ATMBUSADAPTER-XPRO and an ATSAMD21-XPRO Development Board.

How to Connect the 3-Lead Contact mikroBUS Socket Board to an Xplained Pro Host Board
- Configure the EV27Y72A to the desired mode as specified in Modes of Operation.
- Connect the ATMBUSADAPTER to the 3-Lead Contact mikroBUS Socket Board as shown in Figure 3-2.
- Connect the combined ATMBUSADAPTER and 3-Lead Contact mikroBUS Socket Board to one of the XPRO extension connectors on the host board. EXT1 is used in Figure 3-2.
- Connect the USB cables to the TARGET USB Port and the DEBUG USB Port and the host system.
- Invoke the appropriate software development tools for the application.