For example, the current alert comparator 226 may receive an output signal of the current monitor 220 via the output signal line 254 and compare the output signal of the current monitor 220 to a first current threshold (e.g., 3.566V). If the output signal of the current monitor 220 is greater than the first current threshold, the current comparator 226 may send a first current alert signal on the current alert line 256 to the controller 212. In an example, the first current alert signal from the current alert comparator 226 may trigger the controller 212 to change from a sleep mode to an awake mode. Further, since the current alert comparator 226 triggered the controller 212, the first current alert signal may also indicate to the controller 212 that a short circuit occurred on the side of the communication interface 204 based on an increase in current from the communication interface 202 to the communication interface 204 on the detection line 200.

In another example, a second current comparator (not shown) may be configured to respond to, and to indicate, that a short circuit occurred on the side of the communication interface 202 based on an increase in current from the communication interface 204 to the communication interface 202 on the detection line 200.

In another example, current alert comparator 226 may be configured to compare the absolute value of the output signal 254 against a threshold to determine if a short circuit exists on either side, and if so, wake up the fault isolation microcontroller 212.