With CPHA = 1, the first SCK cycle begins with an edge on the SCK line from its inactive level to active level (rising or falling depending on CPOL) as shown in This Figure. The waveforms are shown for CPOL = 0, LSB First = 0, and the value of generic C_SCK_RATIO = 4. All AXI and SPI signals have the same relation regarding S_AXI_Clk and SCK respectively.
