USB EZ-PD™ Type-C Forum Discussions

I am designing a board with that leverages DisplayPort over USB-C and hope to use the CYPD3120 part. 

The connectivity is - PC (DP source) -> DP to USB-C cable (with external connector heads for VBUS power and USB 2.0) -> custom board (USB-C receptacle) -> CYPD3120 (DP ALT mode and PD controller) -> DP sink IC. 

According to the DisplayPort ALT mode spec(v2.1), there is a USB 2.0 billboard device requirement to present the sink capabilities to the host (PC). In this scenario, given I am using DP to USB-C cable, is the billboard device implemented there? How does the cable advertise its downstream capabilities to the host over DP (perhaps over the AUX channel)? Is this BB device not necessary at all given the PC connection is through direct DisplayPort and not USB-C?

If the BB device is incorporated on the cable/not needed, am I free to NC the USB 2.0 connection on CYPD3120 (I have a need for the connection to an on board MCU device)? Thanks. 

CCG8 use GPIO to control FET gate driver for power sink path,

Can i use P-MOSFET for power sink path?

What are the advantages of using N-MOSFET for power sink-path?

1. Spec - Table 6 DC specifications

V5V upper limit value (max) is 5.5V

2. Spec - Table 7 

V5V upper limit value (max) is 6V

<1>. why does Vconn-max have two different value, 5.5V and 6V?

<2>. What will be the result if 6V is supplied on V5V pin ?

The CCG6DF have V5V_P0 and V5V_P1 pins for VCONN source.

1). Does CCG6DF have integrated VCONN - OVP function ?

2). if have , what is VCONN OVP trgiger condition ?

3)  If we supply 6V voltage to V5V_P0 pin , will the any protection be triggered???

Hi

I'm using CY4500 EZ-PD Protocol Analyzer Utility for debugging my USB Type-C application.

I cannot find the "HPD State" on the Details window after I update the utility from v1.0 to 3.1.0.

How can I see the line for "HPD State" decoding result on the details window?

Hi,

I am not able to use the CY4500 PD software on MacOS. The software launches but in some sort of corrupted state that leaves it non-functional. It does not detect the analyzer hardware and clicking "Start" from status bar does nothing. I have attached a screenshot.

I am on M1 MacBook Pro, MacOS 13.5.2.

I posted previously about the software not launching at all and was told to install Java 8. I edited the program's Info.plist to force it to use JDK 1.8.0_181 because it was trying to use JDK 10 before, despite using jenv to switch my default Java to 8. This enabled the software to launch but it is still non-functional as described above.

I have also attached log file.

I know USB PD typically uses only one CC line, but if both CC lines were used, is it possible to switch between the two and send packets or decide which one to connect to, with both Rd pulldowns present at the same time?

Hi!

We have a USB-C dock, with the dock USB-C port typically then in UFP / Source mode, connecting with a laptop.

We are investigating a use-case when the laptop is connected via an Active USB-C cable with an EMCA providing the Status message as a response from a Get_Status sent from our dock. 

However, looking at the EZ-PD documentation it looks like it is not allowed per specification to send messages from an UFP to EMCA. However, in PD 3.1 spec, it says:

Are you able to clarify during which circumstances it is possible to send / recieve messages from an UPF / Power Source to the EMCA via the EZ-PD API and/or HPI interface? 

Cheers

Olof

Hello Support.
Thank you for your usual support.

I would like to write on the SWD line in CCG7D.

Regarding power supply from external power supply to VDDD
・Is it possible to supply 3V from outside?
・Is there no problem even if I don't stop the internal LDO?

best regards,
Koki