USB transaction failures with PSoC 5 connected to a Dell Windows 8 tablet | Cypress Semiconductor
USB transaction failures with PSoC 5 connected to a Dell Windows 8 tablet
We make a line of data collection hardware that connects to Windows/Mac/Linux machines via USB.
Our latest product uses the CY8C5247AXI PSoC5 processor as our controller.
Up until now, it has worked fine with all host computers that we have connected to (Mac OSX and Windows XP & 7).
When we connect our device to a Dell Latitude 10 tablet running Windows 8, the USB connection works fine most of the time, but occasionally we see on our USB protocol analyzer that some IN transactions from the host are ignored by the PSoC. I'm guessing there is some sort of subtle signalling issue that is causing the failures.
Attached is an image showing what our protocol analyzer sees.
Any ideas on how to fix this problem would be greatly appreciated.