USB hosts hubs transceivers Forum Discussions
Hello
Ordering Information is on page17 of the HX3PD data sheet (Document Number: 002-16615 Rev. * F). There is a description of "Signed FW Download" in Table5 Ordering Information, but could you please tell me more details about the difference between (Signed FW Download="No" and Signed FW Download="Yes"?)/ Merit and Demerit.
Best Regards,
Arai
Show LessI understand in USB 3.x, hubs are required to service packets using a priority order: 1) Transaction Packet; 2) Data Packet for interrupt or Isochronous modes; 3) Data Packets for Bulk and Control modes.
Does Cypress conform to the above?
Has Cypress published any metrics with how well it performs the prioritization especially compared to any competitive solutions?
Greg
Show LessDear Support and Expert
We are using CYUSB3326-88LTXI on our product. And we want to test Signal Intergrity on USB Rx lines.
Is there any method to enter the USB HUB Loopback mode?
We are now trying, but we can't.
Please refer attached picutre that 'the DUT is not in Loopback'.
Thanks,
Lee
Show LessHello!
Our company recently purchased a CY4609 interface development board through the authorized CYPRESS store. The power supply was overloaded accidentally and the rated voltage was 5V, but the actual use was 12V. Currently, the development board cannot work normally.
Can it be repaired?Which IC might burn out?
Thanks!
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I was asked about USB2.0 Hub CYUSB2304-68LTXI.
1. What is the actual threshold of VHSDSC(Disconnection Envelope Detector)?
They know that the min & max VHSDSC values described in the USB2.0 specification are 525mV and 625mV.
They need to know the actual threshold which is actually configured or characterized for CYUSB2304.
2. Is it possible for customers to adjust the VHSDSC?
Show LessBased on the 3.1 Standard (Table 7-7), the PENDING_HP_TIMER has a 3 us value. However, I see certain cases that Cypress Hub violates this timer marginally by about ~100-200ns. In our test setup, these recoveries happen quite frequently and eventually hit another condition where four of them happen consecutively forcing the link into Inactive.
I’ve attached a LeCroy’s trace to this post. This trace was collected where the Cypress Hub(1) is immediately after a Host and our device is connected to one of the Hub’s downstream port. In this trace, packet 784 (LGOOD_5 for the first of three Header Packets) is seen 3.110 us after packet 779 (the first of three Header Packets waiting for LGOOD). As the result, the timer has violated the Standard by 110ns.
The setup is:
Host ('See Note1) -- Cypress Hub(1) --- LeCroy Analyzer -- Our Testing Unit --- Cypress Hub(2) ---Other Devices(See Note2)
Host runs camera app for the camera device, and burning tests on other devices
Note1: Windows 10 Version: 1803, OS build: 17134.471 running on Asus Prime Z370-A, Core i5-8400 with 16Gb DDR4 Ram
Intel USB 3.0 eXtensible Host Controller – 1.0, Version: 10.0.17134.1
Note2: i) Samsung T5 SSD, Kingston Datatraveller G4, Verbatim Dog Tag 2.0 Flash Drive, Intel Realsense Camera D415
Has anyone else seen similar issue, and could someone explain what possibly is going on in this setup forcing the timer to fire?
Thanks,
Mohsen
Show LessHi Cypress DevCommunity!
I am currently running into the following situation... Hoping that I can get some help on pinpointing the root cause.
When a device is hot plugged to the downstream port of the CY7C65642 Hub, the hub loses connection to the device and becomes very hot and dysfunctional.
The hub is using its internal VREG to supply +3.3V to VCC_D and VCC_A pins.
(After the hub gets hot and stops working) This scope plot is captured to show the +5V input to the Hub, the +3V3 from the Internal Reg, the PWR# and OVR# of the downstream port the device was plugged in to:
I am also attaching the circuit schematics hoping someone may verify whether the design is correct or not.
Any input or comment is much appreciated!
Thank you,
Kenneth
Message was edited by: Ken Kong
Show LessI am searching for i2c code when cyusb3314 is in slave mode and I can configure individual port power control ,Please share Linux i2c sample code
Show LessHi All,
I am trying to use a CY7C67200 USB control chip to enable communication between an FPGA and a host computer. The reason I am using this chip is that it is pre installed on the development board I am using. I have been trying to get my computer to see the chip in the device manager using a demo code provided by the FPGA manufacturer but I have had no luck. I am starting to think that I do not have the correct driver for this chip due to the fact that when I run the demo code for the computer to see the chip I get several semantic errors. Is there a driver for this chip for windows 10/how can I read the chip using windows 10.
Thank you in advance.
Show LessI 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)?
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