Power-saving mode will turn off USB communication on chip+ MCU production

If the chip+MCU production can transport the data via series port but can not transport the data via USB mode. This may be caused by enabling the power saving mode. Because the power saving mode will close the USB communication to save the power. Take EM3296 for example, EM3296 can scan below barcode to enable power saving function, at the same time USB mode will be closed.

You can scan below barcode to close the power saving function: