Product manual

Spinpoint M9TU-USB 3.0 Product Manual REV 1.0
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USB INTERFACE AND USB COMMANDS
6.2.1.4.3 Low-speed Captive Cable Assemblies
Assemblies are considered captive if they are provided with a vendor-specific connect means (hardwired or
custom detachable) to the peripheral. Low-speed cables may only be used on low-speed devices.
Figure 6-9 illustrates a low-speed hardwired cable assembly.
Figure 6-9: USB Low-speed Hardwired Cable Assembly
6.2.1.4.4 Prohibited Cable Assemblies
USB is optimized for ease of use. The expectation is that if the device can be plugged in, it will work. By
specification, the only conditions that prevent a USB device from being successfully utilized are lack of
power, lack of bandwidth, and excessive topology depth. These conditions are well understood by the
system software.
Prohibited cable assemblies may work in some situations, but they cannot be guaranteed to work in all
instances.
Extension cable assembly
A cable assembly that provides a Series “A” plug with a series “A” receptacle or a Series “B” plug
with a Series “B” receptacle. This allows multiple cable segments to be connected together, possibly
exceeding the maximum permissible cable length.