The SPI variant supports a serial communication bus that allows an external microcontroller to send and receive data with DRV8316C-Q1. 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-Q1.

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