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Hello!
I have a question about DisplayPort over USB type C alternate mode.
Now we are working at the project of device that act as a video signal source and should implement only USB 2.0 link and 4-lane DisplayPort (without!!! USB 3.0) alternate mode over usb type C. I have seen UFP_D Type-C Receptacle Pin Assignments for Normal Plug Orientation & Flipped Plug Orientation (VESA DisplayPort Alternate Mode on USB Type-C Connector Standard) and I found that it is done so that there is no need for use extra mux for flipping DP-signals
My question is: could i route my 4 DP-pairs directly from DP-driver IC to type C connector without using any SS-MUX. I have brifly looked throught specification and
coudn't find any forbiddance. But i'm still worry is it correct to do it in such a way?
Solved! Go to Solution.
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Hi ,
1. VESA DisplayPort Alternate Mode on USB Type-C Connector Standard defines many UFP_D and DFP_U pin assignments.
DFP_U pin assignments A/B/C/D/E/F
UFP_D pin assignments A/B/C/D/E/F
For 4 lane DisplayPort support pin assignments is A/C/E.
2. For your design,
the project of device that act as a video signal source and should implement only USB 2.0 link and 4-lane DisplayPort (without!!! USB 3.0) alternate mode over usb type C.
>> It should be one of above DFP_U, or support all of them DFP_U. And your design have to advertise which UFP_D pin assignments is going to support.
3. Normal Plug Orientation of & Flipped Plug Orientation
If you are implemented DFP_U pin assignments E on your project. The hardware pin assignments have to:
A1 | GND |
A2 | ML2+ |
A3 | ML2- |
A4 | VBUS |
A5 | CC1 |
A6 | D+ |
A7 | D- |
A8 | AUX_CH_P |
A9 | VBUS |
A10 | ML0- |
A11 | ML0+ |
A12 | GND |
B1 | GND |
B2 | ML1+ |
B3 | ML1- |
B4 | VBUS |
B5 | CC2 |
B6 | D+ |
B7 | D- |
B8 | AUX_CH_N |
B9 | VBUS |
B10 | ML3- |
B11 | ML3+ |
B12 | GND |
You could take a look UFP_D pin assignments A/C/E to see whether both Normal Plug Orientation of and Flipped Plug Orientation of them can match above pin assignments or not.
4. If you are going to design a Type-C plug on your end, the MUX can be saved.
Best Regards,
Lisa
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Hi ,
1. VESA DisplayPort Alternate Mode on USB Type-C Connector Standard defines many UFP_D and DFP_U pin assignments.
DFP_U pin assignments A/B/C/D/E/F
UFP_D pin assignments A/B/C/D/E/F
For 4 lane DisplayPort support pin assignments is A/C/E.
2. For your design,
the project of device that act as a video signal source and should implement only USB 2.0 link and 4-lane DisplayPort (without!!! USB 3.0) alternate mode over usb type C.
>> It should be one of above DFP_U, or support all of them DFP_U. And your design have to advertise which UFP_D pin assignments is going to support.
3. Normal Plug Orientation of & Flipped Plug Orientation
If you are implemented DFP_U pin assignments E on your project. The hardware pin assignments have to:
A1 | GND |
A2 | ML2+ |
A3 | ML2- |
A4 | VBUS |
A5 | CC1 |
A6 | D+ |
A7 | D- |
A8 | AUX_CH_P |
A9 | VBUS |
A10 | ML0- |
A11 | ML0+ |
A12 | GND |
B1 | GND |
B2 | ML1+ |
B3 | ML1- |
B4 | VBUS |
B5 | CC2 |
B6 | D+ |
B7 | D- |
B8 | AUX_CH_N |
B9 | VBUS |
B10 | ML3- |
B11 | ML3+ |
B12 | GND |
You could take a look UFP_D pin assignments A/C/E to see whether both Normal Plug Orientation of and Flipped Plug Orientation of them can match above pin assignments or not.
4. If you are going to design a Type-C plug on your end, the MUX can be saved.
Best Regards,
Lisa