SMART Technologies 800 Manuale Utente

Host with internal non-root hub and compound device connection

In this diagram, you can see that connecting a compound device and a host with an internal non-root

hub further limits the maximum distance to 4 × 16' (5 m) = 64' (20 m).

Host with non

-root hub

Compound device

Root

Hub

Function

Host

Host (Tier 1 ) Tier 2 Tier 3 Tier 4 Tier 5 Tier 6 Tier 7

16 ' (5 m ) + 16 ' (5 m ) + 16 ' (5 m ) + 16 ' (5 m ) = 64 ' (20 m )

A P P E N D I X A

USB 2.0 specification primer