TUSB2046B "Sync Reset Pips and Clear Stall"

zion botesazan

Other Parts Discussed in Thread: TUSB2046B

Hello,

On my board I have a UART to USB bridge FT230X communicating to the system PC via TUSB2046B HUB,

The application we are running freezes from time to time then releases, I used USB sniffer and saw "Sync Reset Pips and Clear Stall" command, then the application works fine.

My question is what can cause the "Sync Reset Pips and Clear Stall" ?

Thank you!

Zion

over 10 years ago

0 Elias Villegas M. over 10 years ago

TI__Guru* 76130 points

Hello,

Does this message appears always when isoch transfers are taking place?

Can you take a USB trace with more details like request type, address, data, etc.

Can you share your schematic?

Regards.

0 zion botesazan over 10 years ago in reply to Elias Villegas M.

Prodigy 80 points

Hello,

Our Camera (Isoch. device) is not always on when message appears.

I traced the USB using "USBlyzer" and these are the only feilds it have. Could you please recommend me different analyzer the captures the information you are asking?

Thank you,

Zion

0 Elias Villegas M. over 10 years ago in reply to zion botesazan

TI__Guru* 76130 points

Hello,

The sysn reset pipe is a condition that exist between the USB Host and the FTDI device, it is usually caused by the VCP driver of the USB-to-UART bridge, the hub is only forwarding the transaction.

I found some topics about this condition, for example http://msdn.microsoft.com/en-us/library/windows/hardware/hh968307(v=vs.85).aspx

Regards

Interface

Interface forum

TUSB2046B "Sync Reset Pips and Clear Stall"