Sending serial data via SBU when STUSB4500 has negotiated PDO3

[joe_electric]

I'd like to use STUSB4500 to allow for 20V 60+W to enter the system, but I'd also like to use the sideband pins (or other pins) to send some serial data to the host side. I'd like to know whether this is possible (seems like the chip doesn't use SBU pins to deliver power), and whether this use of SBU during PD is compliant with USB specs.

[NBALL]

hello

STUSB4500 manages only power negotiation with source and does not handle USB3/USB2 or SBU pins.

BTW SBU is generally used in some Alternate modes which are not supported by stusb4500

Best regards

Nathalie