Designing for Mixed USB 1.1/2.0 Environments | Cypress Semiconductor
Designing for Mixed USB 1.1/2.0 Environments
Even though the Universal Serial Bus (USB) specification was upgraded to revision 2.0 back in April 2000, it's only now (early 2003) that desktop PCs are finally beginning to include the hardware required to make this new specification work. Anyone with a new USB 2.0 network can expect to enjoy much better performance than the relatively slow 12-Mbit/s transfer rate afforded by USB 1.1. They will also be able to use their older USB devices, but without expecting improved performance from them. There is a way, however, to potentially increase the performance of even older devices on a USB 2.0 network...