USB hosts hubs transceivers Forum Discussions

I want to know CYUSB2304's I2C AC specs.

However, there is no description of AC specs in "HX3 USB 3.0 Hub datasheet(001-73643 Rev.*R)".

I think it is equivalent to "PSoC Creator Component I2C Master/Multi Master/Slave".

Is there any problem with AC Characteristics (UDB Implementation)?

Hi Cypress

Whether have design issue When We only connect USB3.0 pins in CYUSB3314 circuit Then let USB2.0 pins don't connect anything and keep open , Thank !!

Hi All,

We are working on NXP'S imx8 based custom design. we had interface cypress's CYUSB3304-68LTXI USB hub. It is working fine with SOC.

We need to change the drive strength of the USB HUB. So, we have following queries

1. Is it possible to change the drive strength of USB HUB after config in i2c slave mode?

2. If yes then please share the document for that.

3. Is it possible to configure in run time?

let me know if you need more information.

Reg,

Parth

Hi, we are designing a new USB hub, and I have a question about the #PWR and #OVR pins. If our downstream devices are self powered, is there any problem with bypassing the #PWR and #OVR pins? I am planning to leave the #PWR pins floating and pulling the #OVR pins high with 10k resistors. Will there be any issues with enumeration if the downstream devices are powered up independently of the hub?

Thank you

Hi,

I'd like to use CY7C65632/42 for the project.

I see there's LED control pins on CY7C65632/42 series

But I'm wondering -

1. What is the default control behaviour for GREEN/AMBER?

2. Can you control the LED behaviour?

3. How can you control, by pre-programmed into EEPROM? Or is it either one situation, once either choose EEPROM or LED function?

It's because we want to have LED indicator shows USB data transfer,

and I see there are LED control pins but I don't understand the description fully nor the exact LED control behaviour.

Could you kindly help to elaborate a bit more in detail?

Thanks,

Bertram

We're having problems with a device which uses CYUSB3304 configured in I2C slave mode as a USB hub. When we send a call to the 7-bit address 0x60, the I2C rail will enter a blocked state, never producing the stop condition or releasing SDA or SCL until power is cycled.

I2C Failure when reading from the 7-bit address 0x60:

During normal operation we will see the following behavior form the device when it finds a valid address (0x40 and 0x41)

Schematic section with the CYUSB3304: Note R14 and R22 have been verified as non-stuffed:

Reference Datasheet:

https://www.cypress.com/file/141031/download

We are currently looking into integrating the EZ-USB FX2LP USB Microcontroller in a new product and we would like to understand better how the smart SIE, which implements the Re-enumeration concept (which we find very appealing), works since we fear its complex hardware implementation might interpret into unreliability, which is essential to the product we develop. If not in any further detail, we would be grateful to at least be informed of whether the smart SIE is implemented using a processor running simple code or rather some intricate hardware.

Expecting your immediate reply.

We are planning to use Cypress CY7C65642 USB2.0 very low power USB hub in bus powered mode for our new product.  Can you share me how much is the power consumption of this Hub for 2- DS - ports to be active and both can be HS or FS. Inside the datasheet the power dissipation is shown as 432 mW. This power is not matching with the datasheet active current calculation. Expecting your immediate reply.

Just contact USB, there is a question I would like to ask

There is a registration callback function in the CYUSB3014 firmware programming:

CyU3PUsbRegisterSetupCallback(CyFxSlFIFoApplnUSBSetuPCB, CyTrue);

There are two parameters in CyFxSlFifoApplnUSBSetupCB:

Uint32_t setupdat0,

Uint32_t setupdat1

The two parameters are parsed in the function. I want to ask what these two parameters mean. What do you mean by that? ? ?

     bReqType = (setupdat0 & CY_U3P_USB_REQUEST_TYPE_MASK);

     bType = (bReqType & CY_U3P_USB_TYPE_MASK);

     bTarget = (bReqType & CY_U3P_USB_TARGET_MASK);

Thank you!

William