SWCU194 March 2023 CC1314R10 , CC1354P10 , CC1354R10 , CC2674P10 , CC2674R10
When the SPO clock polarity control bit is cleared, it produces a steady-state low value on the SPIn_CLK pin. If the SPO bit is set, it places a steady-state high value on the SPIn_CLK pin when data is not being transferred.