The SPI/tSPI devices support a serial communication bus that lets an external controller send and receive data with the DRV8311. This support allows the external controller to configure device settings and read detailed fault information. The interface is a four wire interface using the SCLK, SDI, SDO, and nSCS pins which are described as follows:

• The SCLK (serial clock) 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 (serial data in) pin is the data input.
• The SDO (serial data out) pin is the data output.
• The nSCS (serial chip select) pin is the chip select input. A logic low signal on this pin enables SPI communication with the DRV8311.

For more information on the SPI, see Section 8.5.