USB hosts hubs transceivers

Hi Cypress team,

I have a question about the CYUSB3326-88LTXC. In the datasheet, I see that 6 DS ports are available on this chip (2 USB3.0, 2 SS and 2 USB2.0). However, I'm not quite sure if the available USB2.0 are part of the available SS or if they can be used on their own. Could I get some clarifications on that?

To make it clearer, I attached a quick paint drawing of the setup I want to do. I would like to use the 2 USB3.0 DS + the 2 SS DS (not using the shared link option) as USB3 ports and I would also like to use one of the USB2.0 as an embedded connection to a MCU. There would also have a USB3.0 connection to a computer. Could you confirm me if this is possible with the chip I mentioned above?

Thank you and have a nice day,

Keven

In CY4609, the supply of VBUS_US is changed from 5V to 2.5V by the resistance voltage divider of R16 and R17.

What is the reason for this? What is R16 needed for?

Thanks,
Tetsuo

Hi,

In the datasheet there is written:

"Systems using CY7C65621/31 may have the option of using a
fuse ROM which is preset at the factory to configure the hub"

See App Note: AN61904

"Systems using HX2LP have the option of using a fuse
ROM, which is preset at the factory to configure the hub".

Does this mean pre-programmed in default mode or can be customized for customer's needs?

If customized: how? cost? min. Qty?

Is it possible to write on the internal ROM at costumer side?

Hey,

i would like to know the values for the Thermal resistance RΘJA CC.

Can anyone give me a hint as to where this can be found.

Best Regards

Andi

我有一块带有AN2131QC芯片的板子（键盘），连接到win10系统的电脑，设备管理器显示  未知的设备 ，主要提示错误代码28，没有匹配的驱动程序。

现在我不知道在哪里找到匹配的驱动程序

Hi All,

Please help to say difference between CY7C65642-28LTXC & CY7C65642-28LTXCKL.

'KL' is not available in datasheet /Website but is available as a product.

CY7C65642 is NRND part but with KL it's preferred. So, need to understand it's specs & differentiation.

Does the impedance of the clock input terminal change after a while after the power is turned on?

The voltage on the input clock drops a little (from 3.3V to 3V).
I don't know why it happens. I don't even know where to check.

We have made several boards and all of them have this phenomenon. However, this symptom does not appear even though the circuit is the same on the previous board.

Thanks,
Tetsuo

Hello

Performance difference between HX2VL (CY7C65632) and HX2LP (CY7C65630)

(1) Noise level
(2) Terminal strength
(3) Performance value (eye pattern, etc.)

The detailed specification difference is clearer from the data sheet etc., but is there any information on how much difference there is between HX2VL and HX2LP for the above items (1) to (3)?
Also, is there any comparison result information of past test data?

Best Regards

Arai