MSP432E401Y: MAC address

It's pre-programmed into the USER0 and USER1 registers. It's also printed on a sticker on the bottom of the board. As far as I know it's unique. I suppose it's taken from one of TI's OUI  pools, but I don't really know.

As an example of how it's fetched, refer to the code starting about line 276 in enet_lwip.c here:

https://dev.ti.com/tirex/explore/node?node=AN4g.sjUmPqt9O8TxdD94w__J4.hfJy__LATEST