Comment Re:A lot of people fail to notice the real issue. (Score 1) 268
> For example: A device running at 2mb speed that sends
> 500kb in a second uses a full 1/4 of the entire USB
> bandwidth. This automatically chops the 12mb down to
> 9mb, and the 480mb down to 360mb. A 12mb device that
> sends 6mb cuts it in half.
This is true for a 12Mbps bus (both USB 1.1/2.0), but not for a 480Mbps bus (USB 2.0).
USB 2.0 uses split transaction for 1.5Mbps/12Mbps devices, so an 8Mbps USB-1.1 device theoretically only occupies 8Mbps (+some overhead) bandwidth on a 480Mbps bus.
# the overhead might be large, but it is not 320Mbps.
> 500kb in a second uses a full 1/4 of the entire USB
> bandwidth. This automatically chops the 12mb down to
> 9mb, and the 480mb down to 360mb. A 12mb device that
> sends 6mb cuts it in half.
This is true for a 12Mbps bus (both USB 1.1/2.0), but not for a 480Mbps bus (USB 2.0).
USB 2.0 uses split transaction for 1.5Mbps/12Mbps devices, so an 8Mbps USB-1.1 device theoretically only occupies 8Mbps (+some overhead) bandwidth on a 480Mbps bus.
# the overhead might be large, but it is not 320Mbps.
