Package Loss befor chirp | Cypress Semiconductor
Package Loss befor chirp
I'm working with the FX2 (CY7C68013A) in an FPGA application.
We are facing USB communication loss to the FPGA in Long term testing and i am now checking the USB communication on protocol Level.
I use a LeCroy protocol analyzer T2 Mercury.
What i see from the analyzer is, that the last packages befor the FX2 issues a K-Chirp are damaged.
The analyzer marks different error on these packaged: CRC16, CRC5, invalid package ID, …
But it’s always right in front of the K chrip. Anyhow the communication is not interrupted by these damaged packages.
Has anyone experienced such a behavior befor ? Is this a FX2 issue ? A analyzer issue ?
I also see this behavior with the FX2 demo board we bought.