there are two signals, CONN_USB_OTGx_OC, that can be obtained by muxing two pads:
Is it possible to get the USB overcurrent status from Linux? How?
The Reference Manual does not talk about those signals. I have tried to dump all USB-related memory mapped registers in both level conditions (CONN_USB_OTGx_OC high and low). However, all the differences are on undocumented registers (eg. 0x5B1000B0).
(In our design those pads are connected to the fault output pin of a DCDC step-down converter).