The SPI devices support a serial communication bus that allows for an external controller to send and receive data with the DRV835x. This allows for the external controller to configure device settings and read detailed fault information. The interface is a four wire interface utilizing the SCLK, SDI, SDO, and nSCS pins.

• The SCLK pin is an input which accepts a clock signal to determine when data is captured and propagated on SDI and SDO.
• The SDI pin is the data input.
• The SDO pin is the data output. The SDO pin uses an open-drain structure and requires an external pullup resistor.
• The nSCS pin is the chip select input. A logic low signal on this pin enables SPI communication with the DRV835x.

For more information on the SPI, see the Section 13.5.1 section.