STMicroelectronics STEVAL-PCC020V1 USB → I2C/UART Bridge Evaluation Board for HVDPS STNRG011 STEVAL-PCC020V1

The STEVAL-PCC020V1 is self-supplied 5 V from the USB port. An isolated DC-DC module provides the correct supplies to the remaining electronics. The board is also able to provide the target STNRG device with a VCC voltage to program the NVM (if supply is less than 17 V).
Communication between the STEVAL-PCC020V1 and the PC is managed by a standard serial peripheral, converting the USB connection into a virtual COM port. UART RX and TX signals are then isolated with opto-couplers and connected to the STM32 microcontroller, so the USB port and the rest of the board remain isolated from the mains.

Bidirectional communication between PC (USB) and STNRG011
Self-powered from the USB line
On-board 19 V generation for STNRG011 programming
Electric Isolation between USB and other board electronics
UART and I²C bus muxed together on the same interface
On-board firmware upgrade through USB port
Display power metrics (AC voltage, PFC power)