TUSB320: VCONN

Hi Sirs

Thanks for your reply.

We know TUSB320 didn't support VCONN, need choose TUSB321.

But actually we have use TUSB320 not 321, so we would like to know what the phenomenon on 320 when we plug in the active cable? It's will no work? It's will damage? or...

Hi Sirs,

Sorry for pushed.

Any update on here?

Hi,

Since TUSB320 does not source VCONN to the active cable the components in the active cable will stay powered. Specific symptoms will vary depending on the components located in the cable. It is important to remember that active cables will only sink power from VCONN (on the "unused" CC line). VCONN is always sourced from a USB-C receptacle. 

Note: TUSB320 does not have the ability to switch power to the CC line that would support VCONN so the active cable would see an open circuit as TUSB320 will disable its internal switch.

Does this answer your question?

Hi Sirs,

Thanks for your reply.

We still have some question as below

1. If USB C cable with electronic label Vconn is plugged into the TUSB320 control interface, can USB C complete host/device detection normally?

2. Before we use TUSB320, if we use the TUSB322I, will the power supply to the system be affected when the VCONN is powered?

Hi Sirs,

Actually we hope to be compatible with the VCONN features, so we will evaluate the function and application of the TUSB322I;

1. Does the TUSB322I work like the TUSB320? If we replace the TUSB320 with the TUSB322I in our existing design, is it working properly?

2. When the TUSB322 supplies power to VCONN, will it affect the voltage stability of our system?

The difference between the Pins of the TUSB322I and the 320 is DIR and PORT. The DIR has a Mux. How do I connect in   the DIR pin in our design?

Hi Sirs,

Sorry for pushed, any update on here?

Thanks!!

Hi,

Please send updated schematic with TUSB322I and I will review this will be the fastest method. DIR is a flag for plug orientation, this is normally connected to a 2:1 high speed MUX such as HD3SS3212 to ensure the active data lines are routed from connector to host. 

Shucheng:

   did you send Schematic yet?