Question
How can the external ULPI USB transceiver chip (U4 - USB3320C) on the STM32H747I-DISCO board fail and cause a permanent short circuit?
I tried to configure the MCU as a mass storage device using Cubemx without success. The board was connected to the computer with CN1 and CN2 at the same time.
I confirmed that the short was caused by U4 by removing it. After removal of U4 the current consumption dropped from +-1A to +-150 mA.