The SPI devices support a serial communication bus that lets an external controller send and receive data with the MCT8316Z. This support lets the external controller 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 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 MCT8316Z.

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