8.3.5.4 STx and FAULT Reporting

For version A, four individual STx pins report the fault conditions, each pin for its respective channel. When a fault condition occurs, it pulls STx down to GND. A 3.3- or 5-V external pullup is required to match the supply level of the microcontroller. The digital status of each channel can be reported individually, or globally by connecting all the STx pins together.

For version B, a global FAULT pin is used to monitor the global fault condition among all the channels. When a fault condition occurs on any channel, the FAULT pin is pulled down to GND. A 3.3-V or 5-V external pullup is required to match the supply level of the microcontroller.

After the FAULT report, the microcontroller can check and identify the channel in fault status by multiplexed current sensing. The CS pin also works as a fault report with an internal pullup voltage, V_CS(H).