I want to use both SPI_A and SPI_B in my project, but they are both under different “functions”, namely Function 2 and Function 3. Am I able to use both of these SPI interfaces in my project or am I only allowed to use one of them?

Thank you.

you cannot use different function on same pin at same time, but you can use different function on different pin. you should be able to use both SPI_A pins and SPI_B pins at same time.