SNIU028D February 2016 – September 2020 UCD3138 , UCD3138064 , UCD3138064A , UCD3138128 , UCD3138A , UCD3138A64
The Fault Mux registers control a multiplexer which connects power supply fault signals to DPWMs. They also perform several other functions
The Fault Mux is responsible for fault detection and connection, while the DPWM is responsible for the action taken to handle the fault. Even though most of the control for fault response action is based in the DPWM registers, it is discussed in this section (in this way all information relating to the Fault information is available in one location).
Here is an overview of the fault handling system in the UCD3138:
The system is very flexible and powerful. There are 7 analog comparators, 4 fault pins, and 4 digital comparators. Each DPWM has 4 fault inputs which affect its outputs in different ways. Any combination of fault detection outputs can be connected to drive any combination of DPWM fault inputs.
Here are three examples: