wiki/ news/ 2012-08-03 - Further USB Latency Testing

Further USB Latency Testing

We met Friday at the PSBA to better understand USB. Tuesday we tried again but still had really, really bad latency.

Setup

Showing NACKs on the GFE:

Testing on Friday:

Scope

Bulk Transfer Mode:

Bulk Transfer Mode with traffic on the same bus:

Interrupt Mode with traffic on the same bus: