USB hosts hubs transceivers Forum Discussions

Hello forum, I am trying to use the CYUSB3324 with one port Type C for US and one for DS, the other ports are Type-A and SD card reader. My complication arrives trying to Mux the TX and RX pairs, to obtain the 4 pairs required in Type C ports, I have a PD solution in parallel to the HUB, then I am not sure if a MUX with CC controller like HD3SS3220 from TI will entre in conflict with the VBUS PD controller. Do you have any solution for these combinations? Or any other when you want to use the silicon CYUSB3324 for a Type-C solution?

P.S. I can't consider the CYUSB43x7 ICs because those are to expensive for the current budget of this project, also have too many extra ports not required neither.

Hi,
in our application the HX3 would be connected to an embedded SOM (iMX8+) and I need one shared port (USB2 for Touch + USB-SS for a data capture card). So I would prefer the CYUSB3326 (two shared ports).

Could I "recombine" the second shared port back to a simple USB3 connection?

I've found that it is possible to disable the "shared" function - but using an EEPROM where theres only a windows-tool (Blaster) available seems to be a big problem in this application. Or must the shared function activated via the EEPROM (the default states '0000') even at the 3326 Datasheet.
(except I can connect the EEPROM to a second I²C master and reprogram it with our SOM)... but honestly, I want to reduce the complexity as best as possible.

kind regards, Benjamin

Hello, I'm using a CYUSB3324-88LTXC hub on a xilinx zynqmp system and I'm having some trouble getting it into USB3 mode. I am using it in default ROM mode (no eeprom installed) with pin strapping off. Currently everything enumerates fine but in USB2 mode.

I'm trying to isolate whether it is a problem with the zynq or something with the hub. The hub always enumerates a PID of 6506 indicating it's in USB2 mode. Datasheet states that ROM mode should have USB3 enabled by default.

2: Hub, USB Revision 2.10
- Class: Hub
- PacketSize: 64 Configurations: 1
- Vendor: 0x04b4 Product 0x6506 Version 80.0
Configuration: 1
- Interfaces: 1 Self Powered Remote Wakeup 0mA
Interface: 0
- Alternate Setting 0, Endpoints: 1
- Class Hub
- Endpoint 1 In Interrupt MaxPacket 1 Interval 12ms
- Endpoint 1 In Interrupt MaxPacket 1 Interval 12ms

So, if the default is USB3 mode, then under what circumstances will it give the 6506 PID for USB2?

Hi, there is something strange in their development kit, they don't filter the analog and digital voltages correctly.
There is a mix-up there that I don't understand.
If you notice, in the attached picture, there are DVDD voltages connected via a ferrite bead, and some not.

The same about AVDD some are connected via a ferrite bead and some are directly connected to a power supply with VDD_IO which is digital.
Is that the right way to separate the analog and digital supplies?
I usually separate analog and digital supplies with a ferrite bead.
Thanks for the helpers!

I want to do USB2.0 compliance test Host CHIRP Timing for HX2LP.

Is it necessary to switch modes internally to perform this test? Or, can the test equipment automatically judge and test (does HX2LP not need to control anything)?

If any control is needed, could you tell me how to do it?

Please refer to the diagram as follows for the configuration of the test.

Thanks,
Tetsuo

 Hi 

I'm using CYUSB3304-68LTXC  and find sometimes the usb connection is disconnected (Connected from PC to one FPGA baord). Would you please help check the schematics? And it seems the communication get disturbed, so I'm looking for the reference layout design, but cannot find it so far...

Thanks!