As for 3 phase NPC inverter, extra 4 EPWM modules are needed, for example, EPWM3&4 for the second phase, and EPWM5&6 for the third phase. According to the peripheral signal multiplexer for CLB, EPWM1~ EPWM4 output can be replaced with the corresponding CLB output, which means EPWM3&4 need CLB Tile 3 and Tile 4 for the delayed protection using CLB. However, there are only four Tiles within the CLB module for most C2000 devices. As for the third phase, EPWM5B and EPWM6B can not be directly selected with the global input mux and peripheral signal multiplexer. The steps in the following sections are needed for implementing the delayed protection with the CLB.