22.2.1 Normal Mode SPI Operation

In Normal mode operation, the SPI host controls the generation of the serial clock. The number of output clock pulses corresponds to the transfer data width: 8, 16 or 32 bits, or depending upon variable data width configuration, from 2 to 32-bit. Figure 22-2 and Figure 22-3 illustrate SPI host-to-client and client-to-host device connections.

Figure 22-2. Typical SPIx Host-to-Client Device Connection Diagram
Note:
  1. In Normal mode, the usage of the Client Select pin (SSx) is optional.
  2. Control of the SDOx pin can be disabled for Receive Only modes.
Figure 22-3. Typical SPIx Client-to-Host Device Connection Diagram
Note:
  1. In Normal mode, the usage of the Client Select pin (SSx) is optional.
  2. The control of the SDOx pin can be disabled for Receive Only modes.