I have a couple of question on ST's STSPIN32F0A 3-phase BLDC driver and I was hoping someone can help me figure out some parts of the [schematic](https://www.st.com/resource/en/schematic_pack/steval-spin3202_schematic.pdf). The schematic shows the STSPIN32F0A (pg. 1) connected to the onboard ST-LINK debugger via the SWD pins (SWD\_IO and SWD\_CLK, pins PA13 and PA14 respectively) and also via the UART lines (pins PB6 and PB7). 

The SWD lines are for programming the STSPIN32F0A correct? What role is the UART playing here? THere doesn't seem to be any specific firmware for the onboard ST-LINK on the product page. Does this mean it has some custom firmware that isn't public?