USB hosts hubs transceivers Forum Discussions
以下AN72332 - Guidelines on System Design Using Cypress’s USB 2.0 Hub (HX2VL)の
For applications in which the USB Host is an embedded host such as an ASIC or SOC, there is no need to report a different VID/PID than the default Cypress VID/PID. In all other use cases, it is recommended that you have a user-specific VID/PID. You can obtain a VID from USB-IF (http://www.usb.org/developers/vendor/). Users maintain their own PID list.
Hi , I have a question about the CY7C68013A Chip,it is working in Slave fifo mode.Because of the loosening of the USB interface,PC software disconnects USB connection。Especially,The power supply is open, but the USB line is disconnected,it is not possible to reconnect 2 times and receive data。I want to konw how to reconnect of the CY7C68013A and receive data?Show Less
CYUSBS232 USB-UART LP REFERENCE DESIGN KITに関する質問です。
USB-Serial Configuration UtilityにてVID/PID値を書き換えたところ、ツール上で認識されなくなり、デフォルト値に戻せなくなってしまいました。
I am using the HX3 HUB IC.
When I plug into USB 3 upstream and go into vendor mode, all Downstream port are grey out under the Blaster Plus program. If Iook under device manager, all I see is the USB 2.0 MTT driver. I never see the USB 3.0 Hub driver show up.
I have another card that is laid out the same and when I use Blaster Plus none of DS setting are grey out. I also see that the USB 3.0 HUB driver gets installed.
Has anyone ever seen this? Any input would be helpful.
I'm unable to make UART serial communication with FX3. I tried UartLpRegMode example. When I single stepped through my code with a J-link segger debugger, I realized that rxTxByte is always zero and apiRetStatus is 69. I'm not getting anything on the serial terminal when I set to the baud rate I configured in the program. Tried putting some CyU3PDebugPrint statements, but nothing is getting printed. Even, after configuring the UART. Tried shorting TXD and RXD pins to see any loopback, but no improvements. Even manual values are not getting printed. I'm not sure, whether I'm running properly and testing. Any suggestions would be greatly helpful. Thanks for helping !Show Less
Q1)Regarding the bMax-power, it is described on page 14 of the datasheet, but we are understanding that it is necessary to set the Maximum Power value for each connected "devices"?
If no, please tell me the details.
Q2-1) The default value is described as "32h(100 mA)", but please tell me the reason.
Q2-2)When powering HX2VL with self power, is it possible to change the bMax-power descriptor
information by themselves to FAh(500 mA)?If yes, is it possible to change the bMax-power value of EEPROM directly?
Please tell me the state(CMOS output or Open drain or Hi-Z) of PWR#_I2C_SDA pin(26pin) during the following each operation period?
Case1: During Reset.
Case2:Immedietely after reset cancellation(Initial setting).
Case3:During I2C operation.
Case4:Transition period of I2C operation END to /PWR operation start.
Case5:Immedietely after /PWR operation is started(Initial setting)
I have a carrier board with touchscreen and SMARC connector. The touchscreen is connected via USB hub (USB2.0 full speed)
When I connect a SMARC module with SMSC2532 USB hub controller from Microchip and zap the touchscreen with ESD 8kV air discharge, I see no problem with the touch.
When I connect a SMARC module with CY7C65642 USB hub controller and perform the same ESD test, the touch screen stops working.
I could find the ESD performance of the microchip hub which conforms to JEDEC class 3A but I cannot find any information for the CY7C65642 hub controller.
Please guide.Show Less