USB hosts hubs transceivers Forum Discussions

It is connecting HS device as Upstream. And it is necessary to confirm the HS Host in the USB signal quality test(e.g. Proper Eye Measurement) . Is it necessary to make any settings on the HX2LP for signal quality?
Is there anything else I should do other than putting the Host in test packet mode?

The HX2VL has a TEST pin. Not in HX2LP.

Thanks,
Tetsuo

Hello!  I developed a USB 3.0 HUB based from the CY4609 RDK Board.  The first two runs of the boards worked well but the latest are dropping data sporadically on different down stream ports when tested as a USB 3.0 Hub.  I use Passmarks USB3 test plug to loop data through the HUB to make sure all is working well but a majority are having difficulties with failures during Bench Mark and Loop testing.  They fail at different points or will pass one time and fail the next.  It is really hard to try to half split to see what is going on.  I have some built on PCBs from the previous order and some that were built on this order.  Since the PCBs worked last time I don't think its a PCB issue so it must either be a component or manufacturing issue but with nearly every board failing I am at a loss.  

If the upstream of HX2LP is HS and the downstream is connecting HS, FS, LS USB devices, are there any specification restrictions?

Are there any restrictions (differences) in the specifications when communicating with FS and LS at the same time and when communicating alternately after a certain period of time?

In the current application, the upstream is FS, so there is no problem with SingleTT.
In a new application, upstream will be HS, so I would like to confirm if there are any specification restrictions.

Thanks,
Tetsuo

Hello,

If 3.3V is applied to D+ (or D-) without supplying power to VCC (VCC_D/VCC_A), will the device be damaged?

Please tell me about the downstream and upstream ports respectively.

Regards,

Shimamura

Hello Team Cypress,

My team and I are looking in order either to find a helper IC or to replace an USB interface IC that goes into Voice recorder project with USB Hub from one of our clients' design.

Is there a particular Cypress MCU or USB interface IC that comes with the following features in the description?

Current USB hub design from the client is with Microchip USB2422/MJ USB interface IC + physical switch.

              USB2422 Data Sheet (microchip.com)

The physical switch is installed to make selections on connected the devices on the hub, in order to make only the selected device to be updated with firmware. In the next design, the design team wishes to drop the physical switch from the design, and use USB interface IC comes with the logical or software switch feature to make the selection and help the update.

For the next design, after Cypress USB interface IC from the USB hub reads the device host data and by recognizing the the device's usb data bus, the Cypress USB interface IC automatically can identify the connected device and enables either the Data or the Power line connection to the device. When the connection is established, if there is the software command to update on only the certain device to port firmware update, the firmware would only be written to the selected device.

Is there a Cypress MCU or USB interface IC that can help the software device selection feature?
Or is there a Cypress USB interface IC that comes with such selection feature?

Target device is for the running project that is under mass production, but for the next design, the client's design team wishes either to replace or to add the the Cypress USB interface IC or MCU model if the described feature is available.

If you can find the suitable Cypress model that has the features, that would be greatly appreciated. 

Thank you always.

Sincerely,
Ben.

Hello

They have already created a board with CY7C65632-48AXCT and is using it as a DS4 port product.
However, they are thinking of using the same board and replacing it with CY7C65634-48AXCT instead of CY7C65632-48AXCT.
Therefore, since CY7C65634-48AXCT is a DS2 port product, it is used as a DS2 port product.
Q1) Is it possible to use CY7C65634-48AXCT as upward compatibility of CY7C65632-48AXCT?

Best Reagrds

Arai

Good morning everyone,

I'm trying to develop a small board using a 2-ports HUB CY7C65634-48AXC.

At the moment there are no downstream devices connected to the HUB ports, i'm just focusing on getting the HUB device itself up and running.

As a clock source I'm using a programmable oscillator set to 12 Mhz; clock source selection inputs of the Hub IC (SEL48/ SEL27) are connected according to the datasheet specs (both input pulled up to logic "1").

What I see is the following: when I try to plug the board into a windows PC, the device is not enumerated and recognized:

"The last USB device you connected to this computer malfunctioned, and Windows does not recognize it."

If  I look at the board with a scope:

1.  Power rails are OK;
2. When I plug USB into the PC, some transactions are visible on D+/ D- USB lines for about 2/3 seconds;
3. Something strange happens on the CLK line: after 2/ 3 seconds from the startup, the signal amplitude gets lowered (around 2.8 V instead of 3.3 V); also, if I check the XOUT pin on the Hub IC, I can see a 12 MHz signal at the very beginning, but with a "slow" rising slope,then the signal get become a continuos 3.3 V.

Do you have any hint on what I can check in order to isolate the issue? I've already double checked the schematic and everything seems fine and according to the Datasheet requirements.

Thanks in advance,

Regards,

Fabio

Hello All ,

  I am from AIDEN MEDICAL PRIVATE LIMITED,

 We are initial stage of designing an interface USB HUB four channel CY7C65630-56LTXI with STM32H757 micro controller , 

We are using FREE RTOS ,

 HOST MICROCONTROLLER  - STM32H757 (ST MICRO)

HUB FOUR CHANNEL - CY7C65630-56LTXI (CYPRESS)

My question is - whether CY7C65630-56LTXI - will work with FREE RTOS ( STM32H757 MICROCONTROLLER )?

Do you have implementation guide for this?