57.13.1.6 SPI Characteristics

In the figures below, the MOSI line shifting edge is represented with a hold time equal to 0. However, it is important to note that for this device, the MISO line is sampled prior to the MOSI line shifting edge. As shown further below, the device sampling point extends the propagation delay (tp) for Client and routing delays to more than half the SPI clock period, whereas the common sampling point allows only less than half the SPI clock period.

As an example, an SPI Client working in Mode 0 can be safely driven if the SPI Host is configured in Mode 0.

Figure 57-19. MISO Capture in Host Mode
Figure 57-20. SPI Host Mode with (CPOL= NCPHA = 0) or (CPOL= NCPHA= 1)
Figure 57-21. SPI Host Mode with (CPOL = 0 and NCPHA=1) or (CPOL=1 and NCPHA= 0)
Figure 57-22. SPI Client Mode with (CPOL=0 and NCPHA=1) or (CPOL=1 and NCPHA=0)
Figure 57-23. SPI Client Mode with (CPOL = NCPHA = 0) or (CPOL= NCPHA= 1)