The SPI variant supports a serial communication bus that allows an external microcontroller to send and receive data with DRV8316C. This allows the external microcontroller to configure device settings and read detailed fault information. The SPI interface is a four wire interface using the SCLK, SDI, SDO, and nSCS pins which are described as follows:

• The SCLK pin is an input that accepts a clock signal to determine when data is captured and propagated on the SDI and SDO pins.
• The SDI pin is the data input.
• The SDO pin is the data output. The SDO pin can be configured to either open-drain or push-pull through SDO_MODE.
• The nSCS pin is the chip select input. A logic low signal on this pin enables SPI communication with the DRV8316C.

For more information on the SPI, see the Section 8.5 section.