|
|
PATH Hardware Documentation
> USB Devices
> Mac OS USB DDK API Reference
|
An example of the USB physical topology is shown in Figure 2-1. The system software has to know about the physical topology to perform bandwidth measurements in order to optimize bit time requirements for the USB as it grows with additional hubs and devices. Device drivers do not have to know about the physical topology. The USB specification states that the host can handle up to six levels of hub support.
Figure 2-1 USB physical topology
Previous | Back Up One Level | Next |