Phase/Polarity Diagram from a STM32 Manual The choice ... giving us four different “versions” of SPI. The idle state of the clock signal is called clock polarity, and it’s easy to explain.

Moreover, the IP Core supports all 8, 16, 32 bit processors available on the market. The SPI IP is a fully configurable SPI master/slave device, which allows you to configure polarity and phase of ...